助动词do doesdid 和be动词am is are用法的区别

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助动词do \ does \ did 和be动词am \ is \ are 用法的区别



助动词do \ does \ did

do是原形，用于一般现在时态中的第一二人称和第三人称的复数（I,you,we,they）； does是do的第三人称单数形式，用于一般现在时态的第三人称单数（he,she,it，姓名）； did是do的过去式，用于一般过去时态的任何人称（I,you,he,she,it,we,they）。 不管怎样，跟在这三个词后面的动词都必须为动词原形 。

do \ does \ did+ V.（动词原形） 例如：

Do you like meat\ bananas\fish\apples? No,I don`t. Does he like apples? No,he doesn`t. He does like apples. like就是原形

Where did he go yesterday? 他昨天哪儿了？ Did you study English? 你们学过英语吗？

系动词（be动词）am \ is \ are

be是系动词,又称be动词,包括am、is、are三个。 am用于第一人称单数；(I) 第三人称单数用is；(he\she\it)

其他人称全部都用are。(we \they\ you\ 、、、)

was （am \ is 的过去式） wasn’t were（are 的过去式） weren’t



练习题：

______she like drinking? ________they play football? ______she beautiful? ________your dog walk in the zoo? ______she come from China? He ________ like pears. ______she from China? _______ your cats eat fish?

______ he watch TV at night? _______ you go to school everyday? ______ we have a good teacher? I ________ have a watch. ______you a student? , .（否定回答）

There ______ many boats on the lake. Children ______ happy yesterday. Amy ______ hungry yesterday. ______ they young then? ______ he tall then? , .（否定回答） ______ it sunny? , .（否定回答）

______ it windy yesterday ______ Beijing? , .（否定回答） ______ she ______ ______ zoo then? , .（否定回答）

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