名词性从句中whether ,if 的用法区别
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:英语作业 时间:2024/08/15 16:56:30
名词性从句中whether ,if 的用法区别
![名词性从句中whether ,if 的用法区别](/uploads/image/z/3023186-50-6.jpg?t=%E5%90%8D%E8%AF%8D%E6%80%A7%E4%BB%8E%E5%8F%A5%E4%B8%ADwhether+%2Cif+%E7%9A%84%E7%94%A8%E6%B3%95%E5%8C%BA%E5%88%AB)
whether和if的用法区别
whether与if作“是否”讲,在用法上有相同之处,也有不同之处.
一、相同之处.
1.whether和if都能引导宾语从句,常置于see,ask,learn,tell,wonder,doubt,find out等动词之后.
如:He asked me whether/is I could help him.I want to know whether/if he lives there.
2.whether和if都可用it作形式主语从句中.如:it's uncertain whether/if he'll come this evening.
3.在be uncertain/doubtful之后,常用whether引导宾语从句,有时也可以用if,如:We are uncertain whether/if Mary will come.
二、不同之处.
1.whether可置于句首引导主语从句,而if不能.如:___the 2000 Olympic Games will be in Beijing is not known yet.A.whether B.If C.Whether D.That 答案是C.
2.whether可用在介词之后,引导宾语从句,而If则不能.如:Success depends on whether we make evough effort.
3.whether可引导表语从句,if则不能.如:The puestion is whether it is not worthdoing.
4.在名词之后引导同位语从句时,用whether而不用if.如:The puestion whether the students answered correctly should be decided by the teacher.
5.whether后可接不定式,而if不能.如:Please tell us whether to go or stay here.
6.在有些动词(如discuss)之后,只能用whether,而不用if引导宾语从句.如:We discussed whether we should close the shop.
7.在引导否定概念in宾语从句时,只能用if,而不用whether.如:he asked me if I hadn't finished my work.
whether与if作“是否”讲,在用法上有相同之处,也有不同之处.
一、相同之处.
1.whether和if都能引导宾语从句,常置于see,ask,learn,tell,wonder,doubt,find out等动词之后.
如:He asked me whether/is I could help him.I want to know whether/if he lives there.
2.whether和if都可用it作形式主语从句中.如:it's uncertain whether/if he'll come this evening.
3.在be uncertain/doubtful之后,常用whether引导宾语从句,有时也可以用if,如:We are uncertain whether/if Mary will come.
二、不同之处.
1.whether可置于句首引导主语从句,而if不能.如:___the 2000 Olympic Games will be in Beijing is not known yet.A.whether B.If C.Whether D.That 答案是C.
2.whether可用在介词之后,引导宾语从句,而If则不能.如:Success depends on whether we make evough effort.
3.whether可引导表语从句,if则不能.如:The puestion is whether it is not worthdoing.
4.在名词之后引导同位语从句时,用whether而不用if.如:The puestion whether the students answered correctly should be decided by the teacher.
5.whether后可接不定式,而if不能.如:Please tell us whether to go or stay here.
6.在有些动词(如discuss)之后,只能用whether,而不用if引导宾语从句.如:We discussed whether we should close the shop.
7.在引导否定概念in宾语从句时,只能用if,而不用whether.如:he asked me if I hadn't finished my work.
名词性从句中whether ,if 的用法区别
if /whether引导名词性从句的区别?
名词性从句的区别同位语从句 表语从句 宾语从句 主语从句 每个的用法 ,要有造句whether 和if的区别 that什
宾语从句中,如何区别if和whether的用法?
名词性从句中that的用法
请问各位一个英语名词性从句的问题:名词性从句中这几个连接词:that,what,whether,if,how,which
谁知道宾语从句中,如何区别if和whether的用法?
如何区别宾语从句中that,which,who,whom,if,whether的用法?
请问定语从句中,if和whether用法上的区别,
名词性从句的用法
请问名词性从句中expect that 与 expect when的用法区别
名词性从句中,what和which的区别及用法?