主语从句和表语从句.pptxVIP

主语从句和表语从句第1页，共30页。主语从句和表语从句 连词that（不可省略）, whether；连接代词who,whom,whose, whoever, what，whatever和which；连接副词when, where, how和why。第2页，共30页。注意：1. 要使用陈述语序2. that 不可省略3. 根据意思选择恰当的连接词。4.主语从句做主语，表语从句做表语，位 于系动词后。第3页，共30页。主语从句 1) 由what等代词引起的主语从句： What the teacher said today was quite right.? 老师今天说的话是十分正确的。第4页，共30页。 2) 由连词that引起的主语从句： That they are badly in need of help is quite clear. 他们急需帮助，这是十分明显的。 但是这类句子在大多数情况下会放到整个句子的后部去，而用代词it作形式主语。第5页，共30页。 3) 由连接代词或连接副词以及whether引起的主语从句。 Whether they will sell the house is not yet decided. 他们是否卖掉这所房子还没有决定。第6页，共30页。 4) whatever, whoever也可引导主语从句。 Whatever was said here must be kept secret. 这里说的话都应当必威体育官网网址。 Whoever makes mistakes must correct them. 凡犯了错误的人都必须改正。第7页，共30页。 注意: 有时为了使句子结构平衡, 避免 “头重脚轻”, 常用 it 作形式主语, 而把从句放在后面。 例如: 　It is a pity that she has made such a mistake. 她犯了这样一个错误, 真是遗憾。第8页，共30页。这样就构成了下面一些常用句型: 1) It is + adj. / n. +从句 It is a pity/shame that... 遗憾的是…… It is possible that... 很可能…… It is unlikely that... 不可能…… 2) It +不及物动词+从句 It seems/appears that...似乎…… It happened that...碰巧…… 第9页，共30页。　3) It + be +过去分词+从句 　It is said that...据说…… 　It is known to all that... 众所周知…… 　It is reported that... 据报道…… 　It is believed that... 据信……;人们相信…… 　It is suggested that... 有人建议…… 第10页，共30页。填空。 1. _____ you don’t like him is none of my business. 2. _____ he said at the meeting astonished everybody present.3. ________ the 2000 Olympic Games will be held in Beijing is not known yet.4. ________ we’ll go camping tomorrow depends on the weather.5. ________ leaves the room last ought to turn off the lights.ThatWhatWhetherWhetherWhoever第11页，共30页。Exercise1. After Yang Liwei succeeded in circling the earth, ___ our astronauts desire to do is walk in space. A. where B. what C. that D. how解析: what 引导主语从句,在从句中做do 的宾语第12页，共30页。2. ___ the 2000 Olympic Games will be held in Beijing is not known yet. A. Whenever B. If C. Whether D. That答案是C。“2000年奥林匹克运动会是否在北京举行还不知道。” whether可置于句