Susan used to take the bus to school．Susandidn't use to take the bus to school．题目和参考答案——青夏教育精英家教网——

题目内容

6．Susan used to take the bus to school．（改为否定句）
Susandidn't use to take the bus to school．

分析 --苏珊过去常常乘公共汽车上学．
--苏珊过去不习惯乘公共汽车上学．

解答答案：didn't use．考查否定句．used to过去常常，一般过去时态，含有实义动词，变否定句在实义动词前用didn't．实义动词used变原形use．答案是didn't use．

点评考查否定句．通常是在be动词，情态动词后加not．一般现在时态，主语不是第三人称单数用don't，主语是第三人称单数用doesn't．一般过去时态用didn't．还有其它用法需要牢记．

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