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第9天生活就像海洋，只有意志坚强的人才能达到生命的彼岸。知道了数学高考同一道大题第二问能用第一问求出的答案或条件吗？_百度知道
数学高考同一道大题第二问能用第一问求出的答案或条件吗？
如果题目第一问中出现“若”“设”“当”这一类词 那么第二问还能用第一问求出的订甫斥晃俪浩筹彤船廓答案或条件吗？如果能格式方面要怎么操作呢？？
提问者采纳
有一点绝对不行就是第二问不能用第一问求出的答条件 另一点第二问能否用第一问求出的答案不一定，有时候行，有时候不行，这主要看你的读题能力，一订甫斥晃俪浩筹彤船廓般来说第一问与第二问都是接着题目主干来说的，则第二问能用第一问求出的答案。
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其他6条回答
一般不能，除非第二问说了在第一问条件下。因为一般第一问“设”这之类的词，都是假设的一个本来不存在的条件，所以一般不能直接用。但是题目第一问基本都是给第二问做铺垫的，第二问的解法应该会与第一问的有关订甫斥晃俪浩筹彤船廓联，希望可以帮到你。
如果第二问中的条件与第一问的条件相符才能用第一问的答案或者条件，具体还要看情况，虽然我说的是废话，不过还真是那样。
前提条件相同时，后问可以直接引用前问的结果，除非后问有新的条件或假设，
能不能看你理解了，一般情况下是不行的，如果下题有明文的话，应该就会用第一题的结论，其它的一般不会
可以。除非遇到像比赛之类的考试就不行。
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出门在外也不愁现在进行时练习题及答案精选（2）
编辑点评：现在进行时的结构：be doing.be 有is, am,are三种，根据不同的主语选取不同的be动词。例如：当主语是三单的时候用is，当主语是I的时候用am，当主语是复数及第二人称的you的时候用are。 [1] 练习题 [2]
现在进行时练习
一、按要求改写句子
1. The boy is playing basketball. 否定句：__the boy is not playing basketball__________________________
一般疑问句：_is the boy playing basketball________________________
肯定回答：___yes ，it is_______________________否定回答：____no，he is not______________________
对& The boy&提问：__________________________
1).she,the window,open,now.(用现在进行时连词成句.)__she is opening the window now___________________
2).is,who,the window,cleaning?(连词成句)______________________
3).She is closing the door now.(改成否定句)______________________
4.)You are doing your homework.(用&I&作主语改写句子)______________________
5).they,the tree,sing,now,under.(用现在进行时连词成句.)____________________
6).The Young Pioneers are helping the old woman.(改成一般疑问句)__________
二、单项选择
（ ）1.我在照看孩子.
& (A)I am looking after the baby. (B)I'm look aftering the baby. (C)I look am aftering the baby. (D)I looking after the baby.
( )2._____friend's making______a kite. (A)I,me (B) My,my (C)My,me (D)His,his
( )3.Is the woman wearing______ yellow your teacher? (A)in (B)putting on (C)wearing (D)having
( )4.Look!The twins_____their mother do the housework. (A)are wanting (B)help (C)are helping (D)are looking
( )5._____are the birds doing? They are singing in a tree. (A)Who (B)What (C)How (D)Where
&( )6.Is she____something? (A)eat (B)eating (C)eatting (D)eats
( )7.你在干什么? (A)What is you doing? (B)What are you do? (C)What are you doing? (D)What do you do?
( )8.What are you listening_____? (A)/ (B)for (C)at (D)to
( )9.我正在听他说话. (A)I listening to him. (B)I'm listening to him. (C)I'm listen to him. (D)I'm listening him.
( )10.They are_____their clothes. (A)makeing (B)putting (C)put away (D)putting on
( )11.Listen! She____in the classroom. (A)is singing (B)sing (C)to sing (D)is sing
( )12.Today Jim______ his white shirt and brown trousers. (A)is putting on (B)wear (C)put on (D)is wearing
( )13.______are you eating?I'm eating______meat. (A)What,some (B)Which,any (C)Where,not (D)What,a
( )14.They______TV in the evening.They do their homework.
(A)are watching (B)can't watching (C)don't watch (D)don't watching
( )15.The children_____football. (A)is playing (B)are playing (C)play the (D)play a
( )16.They are flying kites. (A)他们喜欢放风筝. (B)他们在放风筝吗? (C)他们在放风筝. (D)他们常放风筝.
( )17.Look,They are swimming in the river. I want_____you. (A)to go with (B)go with (C)helping (D)help
( )18.Look.Lucy is_____a new bike today. (A)jumping (B)running (C)riding (D)takeing
三、用现在进行时完成下列句子:
1.What_________you__________(do)? 2.I_____________(sing) an English song.
3.What________he____________(mend)? 4.He______________(mend) a car.
5.______you__________(fly) a kite?Yes,_______. 6.______she___________(sit) in the boat?
7.______you_____________(ask) questions? 8.We_______________(play) games now.
四、写出下列动词的现在分词：
play___run_____swim____make_____go_____study_____write___read____have_____sing____dance_____put________ see___ buy____ eat ______live____take____come____get_____stop_____ sit ____ begin_____ shop_____ chat_____ rain_____take______ fly_______
五、用所给的动词的正确形式填空：
1.The boy ________ ( draw)a picture now. 2. Listen .Some girls ________ ( sing)in the classroom .
3. My mother __________ ( cook )some nice food now. 4. What _____ you ______ ( do ) now?
5. Look . They _________( have) an English lesson . 6.They ________(not ,water) the flowers now.
7.Look! the girls ____________(dance )in the classroom . 8.What is our son doing? She ______ (listen ) to music.
9. It&s 5 o&clock now. We _____________(have)supper now 10.______Helen____________(wash )clothes? Yes ,she is .
六、句型转换：
1. They are doing housework . 一般疑问句：__________________ 否定句： _________________
2．The students are cleaning the classroom . 一般疑问句：__________________ 否定句： _________________
3．I&m playing the football in the playground .(对划线部分进行提问)_____________
4．Tom is reading books in his study . (对划线部分进行提问)________________
七。填空1. What are you _____ (do) now? I _________(eat) bread.
2. It&s nine o&clock. My father______ (work) in the office. 3. Look, the boy____________(put) the rubbish into the bin.
4. ________he______(clean) the classroom? No, he isn&t. He_________(play).
5. Where is Make? He_________(run) on the grass.
6. Listen, who_________(sing) in the music room? Oh, Mary_______(sing) there.
八、将下列句子改成现在进行时
1. Tom speaks Chinese. _____________________ 2. We have four lessons. ___________________
3. I watch TV. _____________________________ 4. She works in a hospital. ____________________
5. Kitty and Ben have lunch at abouttwelve. ____________________ 6. His father helps them. _______________
7. Danny, open the door._______________________ 8. They watch TV ._________________________
九.按要求改写句子
1. The boy is playing basketball. 否定句：_________________ 一般疑问句：_____________________
肯定回答：______否定回答：__________ 对&is playing basketball&提问：_______________________
对& The boy&提问：_______________
2. They are singing in the classroom. 否定句：__________________一般疑问句：__________________
肯定回答：________否定回答：__________ 对&are singing &提问：_______________________
对& in the classroom&提问：_____________
十.用现在进行时完成下列句子:
1.What______you______ (do)? 2.I_______ (sing) an English song.
3.What________he________ (mend)? 4.He_________ (mend) a car.
6.______she___________(sit) in the boat? 7.______you_____________(ask)questions?
8.We_______________(play) games now
十一. 选择填空。
( )1. Some are _________ in the river and some are _____ games.
A. swiming, skating B. swimming, skating C. swimming, skateing
( )2. Look! The boy students are ___ football while the girls are ________.
A. playing, dance B. playing, dancing C. play, dancing D. play, dance
( )4. ________ he ______ on well with his friends this term? A. Dose, gets B. Dose, get C. is, getting D. Is, geting
( ) 5. Mr. Smith ______ short stories, but he ______ a TV play these days.
A. is writing, is writing B. is writing, writes C. writes, is writing D. writes, writes
( ) 6. I _______ to the cinema. I _________ there every Sunday.
A. go. go B. am going, go C. go. am going D. am going, am going
( ) 7. Look. they _________ a good time, _________ they?
A. have, do B. have, don't C. are having, are D. are having, aren't
( ) 8. You ________about the future (将来) now, ________you?
A. don't think, don't B. aren't thinking, aren't C. don't think, do D. aren't thinking, are
十二. 用一般现在时或现在进行时填空。
1. Miss Guo___ (teach) us Chinese this term. She____ (be) a very good teacher. She often____ (talk) with us after class. Many of us like____ (talk) with her. Now, she___ (talk) with Lily
2. Listen! Who____(read) English? Han Meimei is. She often_____(read) English in the evening.
十三　一般现在时和现在进行时练习题
( )11. Who _____ over there now? A. singing B. are sing C. is singing D. sing
( )2. It&s eight o&clock. The students ___ an English class. A.have B.having C.is having D.are having
( )3. Listen! The baby ____ in the next room. A. crying B. cried C. is crying D. cries
( )4. Look! The twins _____ new sweaters. A. are wearing B. wearing C. are wear D. is wearing
( )5. Don&t talk here. Grandparents _____. A. is sleeping B. are sleeping C. sleeping D. sleep
( )6. Tom is a worker. He _____ in a factory. His sisters _____ in a hospital.
　　 A. work/ work B. works/ work C. work/ works
( )7. Who _____ English best in your class? A. speak B. speaks C. speaking
( )8. Mrs Read _____ the windows every day. A. is cleaning B. clean C. cleans
( )9. We ____ music and often ____ to music. A. like/ listen B. likes/ listens C. like/ are listening
( )10. She ___ up at six in the morning. A. get B. gets C. getting
( )11. The twins usually ___ milk and bread for breakfast, but Jim ____ some coffee for it.
　　 A. have/ have B. have/ has C. has/ have
13. My father always _____ (come) back from work very late.
14. The teacher is busy. He __________ (sleep) six hours a day.
15. Listen! Joan _________(sing) in the classroom. She often ________ (sing) there.
16. _______ your brother _____(know) Japanese?
17. Where __________ you __________ (have) lunch every day?
18. The girl _______(like) wearing a skirt. Look! She _____(wear) a red skirt today
十四1. What are you ________(do) now? I _______ (eat) bread.
2. It&s nine o&clock. My father__________(work) in the office.
3. Look, the boy____________(put) the rubbish into the bin.
4. __________he__________(clean) the classroom? No, he isn&t. He____________(play).
5. Where is Mak? He___________(run) on the grass.
6. Listen, who____________(sing) in the music room? Oh, Mary_____________(sing) there.
十五 将下列句子改成现在进行时
1. Tom speaks Chinese.
2. We have four lessons.
3. I watch TV every day.
4. She works in a hospital.
5. Do you like this book?
6. Kitty and Ben have lunch at about twelve.
7. His father can help them.
8. Danny, open the door.
9. They watch TV in the evening
十六 造句:
1).she,the window,open,now(用现在进行时连词句.)_____________________
2).is,who,the window,cleaning?(连句)______________________
3).She is closing the door now.(改成否定句)______________________
4.)You are doing your homework.(用&I&作主语改写句子)______________________
5).they,the tree,sing,now,under.(用现在进行时连词成句.)____________________
6).The Young Pioneers are helping the old woman.(改成一般疑问句)__________
现在进行时的结构：be doing.be 有is, am,are三种，根据不同的主语选取不同的be动词。例如：当主语是三单的时候用is，当主语是I的时候用am，当主语是复数及第二人称的you的时候用are。
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