李　敏

do和does被評為單詞界的“活雷鋒”!頒獎詞是：“因為他倆用作助動詞時，本身并沒有實在的意義，但卻熱心地幫助實義動詞構(gòu)成一般疑問句和否定句?！钡拇_如此，你瞧：

He has an English book——Does he havean English book? (一般疑問句)

Mary plays football every afternoon.——Mary doesn't play football every afternoon.(否定句)

看到了吧，含有實義動詞的句子在變一般疑問句和否定句時，不能直接在動詞上變，而是要靠do和does的幫助：當(dāng)d0和does站在句首時，句子就變成了一般疑問句：當(dāng)(do和does的否定形式dont和doesnt站在謂語動詞前時，句子就變成了否定句。

注意：這兩種句子中的實義動詞要變成原形。do和does有明確的分工：does只管主語是第三人稱單數(shù)(he，she，it或單數(shù)名詞)的句子；其余的一律歸do管。用所給動詞的適當(dāng)形式填空：

1. He________(live) in Wuxi two years ago.

2. The cat___________(eat) a bird last night.

3. We__________(have) a party last Halloween.

4. Nancy____________(pick) up oranges on the farm last week.

5. I____________(make) a model ship with Mike yesterday.

6. They______________(play) chess in the classroom last PE lesson.

7. My mother_____________(cook) a nice food last Spring Festival.

8. The girls____________(sing) and____________(dance) at the party.