用方框中短语的正确形式填空.be based on,dressup,begoodat, havedifficultyin, belong to, playaroleof,die from 1. In big cities during cold winter months, many old-九年级英语
例：
①陈述句：She is a student.
疑问句→ Is she a student?
否定句→ She is not a student.
②陈述句：I can swim.
疑问句→ Can you swim
否定句→ I can not swim.
（2）当句子中即没有be动词，也没有情态动词时，则在主语前加助动词do (you,以及复数),does（单数she,he,it）变成问句；
在主语后谓语动词前加助动词don’t（I,you,以及复数), doesn’t（单数she,he,it）变成否定句，助动词后的动词要变成动词原形。
例：
①陈述句：We get up at 7:00 every morning.
疑问句→Do you get up at 7:00 every morning?
否定句→We don’t get up at 7:00 every morning.
②陈述句：She has a little brother.
疑问句→ Does she have a little brother?
否定句→ She doesn’t have a little brother.
一般现在时的表达方法：
主要通过谓语动词的变化和用时间词语来表示，其中最主要的是谓语动词的变化。现在一般时动词变化的规则是：
1.如果主语是名词复数和第一人称I、 we ，谓语动词不用做任何变化，即仍然用动词原形表示：
We usually go to school at 7:30. 我们通常7:30上学去。[go]
My parents give ten yuan to my sister every week.我父母每星期给我妹妹十元钱。[give]
2.主语是任何一个单数名词或者是第三人称单数，谓语动词要进行必要的变化。特别提一点：不可数名词也算作单数处理。
3.谓语动词的变化规律是：
第三人称单数的构成见下表：
![- How does Mrs. Green usually go to work?- She _____ take a bus, but now she _______ riding a bike because she wants to lose weight.[ ]A. used to; used to B-九年级英语](http://www.00-edu.com/d/file/ks/4/2/dongciduanyu/2020-01-08/smalla8361fbd1059579fc7d3bfa2b4810e271578431069.png)
![Mrs. Green is out. I have to ________ her baby.[ ]A. look around B. look upC. look for D. look after-九年级英语](http://www.00-edu.com/d/file/ks/4/2/dongciduanyu/2020-01-08/small5c84dcc47454a4dc33037579e574f0c81578431692.png)
![Mrs Smith ______ a teacher. But she doesn't do that job now. [ ]A. used to beB. was used to be C. has beenD. was used to doing -九年级英语](http://www.00-edu.com/d/file/ks/4/2/dongciduanyu/2020-01-08/small3601c7029b4d16872e8ed4d1efebe47f1578421499.png)
