現(xiàn)在進(jìn)行時(shí)態(tài)的肯定式、否定式、疑問式及簡略回答。

1)肯定式：be+v-ing

She is singing in the next room.

2)否定式：be+not+v-ing

The students aren’t cleaning the room.

3)一般問句：be動(dòng)詞提前。

肯定答語Yes，主語+be。

否定答語No，主語+be not。

Are you playing the computer game? Yes, I am. /No, I am not.

4)特殊問句：對(duì)謂語動(dòng)詞進(jìn)行提問的：What+be +主語+doing+其他?

What is the old man doing under the tree?

對(duì)其他成份進(jìn)行提問的，疑問詞+一般疑問句?

Where is the boy swimming?

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