语法系统复习（一）
现在进行时：用于表示现在正在进行的动作，如：what are you doing now?
基本结构为be加动词的现在分词，如：i am reading a book.
变否定在be后面加not,如i am not reading a book.
变一般疑问句把be动词提前，如are you reading a book? yes, i am. no, i am not.
一般现在时：主要有以下三方面，① 用来表示状态，特征或不受时间限制的客观存在和真理。如：
matter exists in three states物质有三态。又如：the earth moves around the sun ② 表示习惯性和经常发生的动作，如：
i often go to bed at 9∶３０在时间、条件等状语从句中表示将来要发生的动作，如：as soon as i get there i'll telephone you.
基本句式包括肯定句，否定句和一般疑问句。
一般现在时态中的肯定句有数量和人称的变化，如 get up very early. 我很早起床。
2. he___get) up very early3.。mary___get) up very early.
4. my parents___get) up very early. 5。 lucy and mike___get) up very early.
否定句和一般疑问句要借助于根据人称的变化分别使用助动词do或does，试翻译下面句子：1。他每天不在家照顾他的妹妹。
2。他们经常乘公车去上学吗。
3．我每天不看电视。
4。迈克每周六去参加晚会吗。
语法专练：用动词的正确形式填空。
1. i ’m notfeel) very well at the moment.
2. iplan) to h**e a relaxing vacation this winter.
3. on saturday mrs. brown usually___wash) some clothes.
4. look! the old man___get)on the bus.
5. we___not visit)that factory next week.
6. my father usuallywatch) tv in the evening.
7. ile**e) for beijing tomorrow.
8 . mr greenteach) his students english。
9she __exercise) twice a week?
10. listen! who __sing)over there?
选择题。1．the kite is flying high in the sky. it ＿＿a bird.
a. looks at b. looks like c. looks for d. looks after
2- look! what's wang ping doing over there?
- she ＿＿under a big tree.
a. sings b. sang c. has sung d. is singing
3- where is mr zhang?
- look! he ＿＿on a big machine over there.
a. works b. worked c. is working d. has worked
4．ahow do you usually comeschool？
b：i usually comebus．
a．at，in b．to，with c．to，by d．by，to
5 。a：are you free tomorrow？
b：no． isee my grandma with my mother．
a．be going to b．am going to to not going to
6． his grandmother is well because she often __
a. exercises b. smokes c. sleeps d. sings
写作练习：用一般现在时态分别描述两个同学和你的饮食习惯及如何去上学。
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