比较:whether与if 均为"是否引导名词性从句的连接词可分为三类: 连接词:that,whether,if 不充当从句的任何成分) 连接代词:what, whatever, who, whoever, whom, whose, which. 连接副词:when, where, how, why 不可省略的连词: 1. 介词后的连词 2. 引导主语从句和同位语从句的连词不可省略。 That she was chosen made us very happy. We heard the news that our team had won. "的意思。但在下列情况下, whether 不能被if 取代: 1. whether引导主语从句并在句首 2. 引导表语从句 3. whether从句作介词宾语 4. 从句后有"or not" Whether he will come is not clear. 大部分连接词引导的主语从句都可以置于句末,用 it充当形式主语。 It is not important who will go. It is still unknown which team will win the match.
2016春湘少版版英语五下Unit 1《We’re going to read stories》ppt课件2
2016春湘少版版英语五下Unit 10《Where were you yestoday》ppt课件1
湘少版英语五下《Unit 9 Benny took my ball》PPT课件包
2016秋湘少版英语五年级上册Unit 7《What time do you get up》ppt课件2
2016春湘少版版英语五下Unit 10《Where were you yestoday》ppt课件2
湘少版五下《Unit 3 There’s a policeman near the post office》ppt课件
2016秋湘少版英语五年级上册Unit 7《What time do you get up》ppt课件7
2016春湘少版版英语五下Unit 2《We’re going to do some research》ppt课件2
2016秋湘少版英语五年级上册Unit 8《Lingling helps her parents》ppt课件2
2016秋湘少版英语五年级上册Unit 8《Lingling helps her parents》ppt课件1
2016秋湘少版英语五年级上册Unit 9《What’s your hobby》ppt课件
2016秋湘少版英语五年级上册Unit 7《What time do you get up》ppt课件5
湘少版五下《Unit 6 Was it in the wardrobe》ppt课件
2016春湘少版版英语五下Unit 11《Who was first》ppt课件2
2016春湘少版版英语五下Unit 10《Where were you yestoday》ppt课件4
2016春湘少版版英语五下Unit 10《Where were you yestoday》ppt课件3
2016春湘少版版英语五下Unit 11《Who was first》ppt课件3
2016春湘少版版英语五下Unit 4《Don’t talk here》ppt课件2
2016秋湘少版英语五年级上册Unit 8《Lingling helps her parents》ppt课件3
2016秋湘少版英语五年级上册Unit 9《What’s your hobby》ppt课件2
2016秋湘少版英语五年级上册Unit 9《What’s your hobby》ppt课件1
湘少版五下《Unit 1 Draw a cat on the roof》ppt课件
湘少版五下《Unit 7 When’s your birthday》ppt课件
2016秋湘少版英语五年级上册Unit 8《Lingling helps her parents》ppt课件
2016春湘少版版英语五下Unit 4《Don’t talk here》ppt课件1
湘少版英语五下《Unit 8 That’s not mine》PPT课件
2016春湘少版版英语五下Unit 12《Where did you go》ppt课件1
2016春湘少版版英语五下Unit 1《We’re going to read stories》ppt课件3
湘少版英语五下《Unit 9 Benny took my ball》PPT课件
2016春湘少版版英语五下Unit 11《Who was first》ppt课件4