【起止标识】标记非谓语动词短语时,一定是从动词不定式(to do)、动名词(doing)或分词(现在分词doing或过去分词done)开头,到以下四种情况终止。 ① 到句尾终止,如:Li Hui is a teacher (teaching English). ② 到句中的逗号终止,如:(To improve my English), I often l...
解析:本题句意为“玻璃门替换了木头门,自然光就进来了”,自然光进来时顺其自然的结果,所以用doing, 答案为B。 例22.How glad I am ___ you ! A. seeing B. to see C. saw D. having seen 解析:本题是I am glad to see you 的感叹句形式,to see you 是原因状语,答案为B...
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