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三道高一英语 分词和时态的题目.高中帮下忙,每题要有理由.

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三道高一英语 分词和时态的题目.高中帮下忙,每题要有理由.
____ the traffic light turning green,the boy quickly walked across the road.
A.Seeing B.Having seen C.Saw D.See
______very waek,Linda can't move; she has to lie in bed all day.
A.Being B.To be C.Having been D.Be
---Why were you absent from the meeting?
---I___ for a long-distance call from my sister in Australia.
A.wait B.was waiting C.had waited D.waiting
1.____ the traffic light turning green,the boy quickly walked across the road.
A.Seeing B.Having seen C.Saw D.See
选A.现在分词短语做状语.
现在分词的一般式表示和句子的谓语动词的动作同时发生.
首先排除C和D.因为句子中的逗号后面没有连词,说明第一个不能是和后面并列的句子.
B 是现在分词的完成时,表示动作在谓语动词的动作之前发生.
2.______very waek,Linda can't move; she has to lie in bed all day.
A.Being B.To be C.Having been D.Be
选A.现在分词做状语在这里表原因.
B 不定式做状语表目的
C项和D项错误和第一题同理.
3.---Why were you absent from the meeting?
---I___ for a long-distance call from my sister in Australia.
A.wait B.was waiting C.had waited D.waiting
选B.表示我当时没开会的时候而是在等电话.
翻译:我正在等澳大利亚的姐姐打来长途电话.
A 一般现在时显然和问句的were不一致.D项,现在分词不可以单独作谓语.