15. (情态)动词can,must, should 后面直接用动词原形。
eg:     1. I / He / She / They can sing.
        2．You should keep quiet in the library.

16. 一般过去时态
（a） be 动词的过去式:
I/He/she/it was(not)…. You/we/they were….
一般疑问句was, were 放在句首。
（b） 动词过去式：
肯定句： I watched cartoons.
         She visited the zoo.
一般疑问句： Did you read book last night? Yes, I did. No, I didn’t.
             Did she clean the desk just now? Yes, she did. No, she didn’t.
否定句： They didn’t go the the part yesterday.
          He didn’t make model ships last week.
(3)动词过去式的变化：
规则动词的变化：
Most verbs +ed eg. planted,watered,climbed。
Verbs ending in e +d eg liked。
Verbs ending in a consonant +y --y +ied eg : study—studied
Short verbs ending in a vowel + a consonant eg: stop --stopped
不规则动词的变化：
is/am—was,are—were,do—did,have/has—had,make—made,fly-flew/u:
eat—ate,take—took,run—ran,sing—sang,drink—drank 等等

17. “Wh-” questions.
What are you doing?
What colour is it?
What time is it? What’s the time?
Which is your watch, the yellow one or the white one?
Who’s the man with a big nose?
Whose bag is it?
When is your birthday?
Where is my ball pen?
Why do you like summer?
How many books are there in the school bag?
How old is the young man?
How much is the toy bear?
How do you go to school everyday?

15. (情态)动词can,must, should 后面直接用动词原形。
eg:     1. I / He / She / They can sing.
        2．You should keep quiet in the library.

16. 一般过去时态
（a） be 动词的过去式:
I/He/she/it was(not)…. You/we/they were….
一般疑问句was, were 放在句首。
（b） 动词过去式：
肯定句： I watched cartoons.
         She visited the zoo.
一般疑问句： Did you read book last night? Yes, I did. No, I didn’t.
             Did she clean the desk just now? Yes, she did. No, she didn’t.
否定句： They didn’t go the the part yesterday.
          He didn’t make model ships last week.
(3)动词过去式的变化：
规则动词的变化：
Most verbs +ed eg. planted,watered,climbed。
Verbs ending in e +d eg liked。
Verbs ending in a consonant +y --y +ied eg : study—studied
Short verbs ending in a vowel + a consonant eg: stop --stopped
不规则动词的变化：
is/am—was,are—were,do—did,have/has—had,make—made,fly-flew/u:
eat—ate,take—took,run—ran,sing—sang,drink—drank 等等

17. “Wh-” questions.
What are you doing?
What colour is it?
What time is it? What’s the time?
Which is your watch, the yellow one or the white one?
Who’s the man with a big nose?
Whose bag is it?
When is your birthday?
Where is my ball pen?
Why do you like summer?
How many books are there in the school bag?
How old is the young man?
How much is the toy bear?
How do you go to school everyday?