【误区纠偏】 易错点1 情态动词+have done用法混用 ①We________so much food because Suzie was too busy to be with us for dinner last night.
②(变式)We________so much food now that Suzie is too busy to be with us for dinner.
A. needn’t have bought B. need have bought C. didn’t need to buy
D. need buy 【点拨】 (1)needn’t have done sth. 表示“本不需要做某事, 而事实上却做了。” (2)didn’t need to do sth. 表示不必要, 而事实上也没有做某事。 (3)根据题①句意可知因为Suzie昨晚太忙不会来吃饭, 所以没必要买这么多的食物, 故选C。而由题②句意可知既然Suzie太忙不来吃饭, 本没必要买, 言外之意却买了, 可知选A。 易错点2 虚拟语气和陈述语气混用 ①My son insisted that I______his letter after looking around his study.
②(变式)My son insisted that I______his letter after he received it from his teacher.
A. was reading
B. had read C. should read
D. have read 【点拨】 (1)题①句意: 环视书房后, 我儿子坚持说我看过他的信。insist“坚持说”, 后面用陈述语气; read动作发生在insisted之前, 表示“过去的过去”这一时间概念, 所以用过去完成时, 选B。 (2)题②句意: 收到老师的来信后, 我儿子坚持要我看他的信。insist“坚持认为”, 其后的从句中要用(should+)动词原形, 故选C。 易错点3 虚拟语气时间判断错误 ①—I don’t know what I______without the suitcase you lent me.
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