非谓语动词和从句的转换优秀 课件
一、什么叫做非谓语动词
在英语中,动词按其在句子中的作用,可分为: 谓语动词和非谓语动词。 谓语动词就是可以单独直接在句子中做谓语的动词。 非谓语动词就是不能单独在句子中做谓语的动词。
二、非谓语动词的表现形式有:
不定式 (to do) 现在分词 (doing) 过去分词 (done) 动名词 (doing)
1. 时间状语:可改为时间状语从句,也可在分词前加上 连词“when , while , until”等,使其时间意义更 明确。(多置于句首,也可置于句末)
2. 原因状语:可改为原因状语从句或并列结构。(多置于 句首或句末,也可置于句中)
3. 条件状语:可加连词if , unless 等;也可换成条件 状语从句。(多置于句首)
If we weIrfegGgiivviveeennn more time , we could do it much better .
He was Wwarned of the danger, bhuet he still went skating on the ice.
但是,有些分词作状语是独立结构,不与句子的主语 产生联系;常见的有:judging from, generally
While waiting at the dentist’s, I read the whole of a short story. (=While I was waiting … ) Before being in the army, he was an engineer.
(= Before he was in the army, …) __H_av_in_g__fi_ni_sh_e_d__(finish) my work, I went to