doing作状语课件.pptVIP

2）完成时表示动作发生在谓语动词之前。 1.After he had finished his homework, he went out. =Having finished his homework, he went out. 2.Because she had not got a reply, she decided to write to him again. =Not having got a reply, she decided to write to him again. 一、有些惯用的v-ing形式不表示句子主语的动作，而是表示说话人的态度、观点等。可当作一个插入语 generally speaking 一般说来 strictly speaking 严格说来 frankly speaking … 坦白地说 judging from/by … 根据……来判断 considering … 考虑到…… supposing 假如，如果 几点注意 1. Generally speaking, boys are more interested in science than girls. 一般说，男孩比女孩对科学更感兴趣。 2. Judging from/by his accent, he must come from Canada. 从他的口音看，他一定来自加拿大。 3. Considering/given his age, he did it quite well. 考虑到他的年龄，他做得很好了。 4. Suppose/Supposing it rains， what will you do？ 假使下雨，你会怎么办呢？ 二、分词作状语时，可以根据需要在其前加上when, while, before, after, until, once, though, although, unless, as if, even if, as long as等 1. Once losing this chance, you can’t easily find it. 2. If allowed to read in the reading room, you should keep quiet. 3. When leaving the station, he waved again and again to me. Losing Allowed Leaving 三、 当表示分词的动作一发生，主句的动作 随之也发生时，可以使用“on＋动名词”的结构，翻译成“一……就……”。 Hearing the news, they couldn’t help jumping. = On hearing the news, they couldn’t help jumping. ___ ________ the case, I saw the bird fly out of it. 一打开这个盒子，我看到有只鸟飞出来。 On opening 句型转换： When he heard the news, he jumped with joy. _________ the news, he jumped with joy. 2. As she was ill, she went home. ________ ill, she went home. 3. The girl came in and she smiled. The girl came in ___________. She sat at the desk and read a newspaper. She sat at the desk _________ a newspaper. Hearing Being smiling reading 表伴随状况 时间状语 原因状语 方式状语 Grammar work 语法专练 用所给动词的适当形式填空。 1. Not ________(know) his address, I couldn’t go to see him yesterday. 2. Look out(小心） for cars when ___________(cross) the street. 3. Not _________________ (invite) to the party, Mary was greatly hurt. knowi