句型转换1. David does his homework every day.(否定句) David __________ __________ his homework every day.2. They are old books.(改为单数形式)__________ ____-七年级英语

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Eg. Tom’s father listens to English on the radio every evening. →Does Tom’s father listen to English on the radio every evening?
特别注意:对于第二家族一定要注意动词的还原,因为时态与数的变化已经体现在助动词上了。

3、加强记忆口诀:
肯变一,并不难,can 或be提在前;
谓语若为行为动,do 或does句首用。

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