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.
谁知道宾语从句中,如何区别if和whether的用法?
谁知道宾语从句中,如何区别if和whether的用法?
英语人气:254 ℃时间:2020-03-26 07:06:05
优质解答
我来回答
类似推荐
猜你喜欢
- 1CO还原Fe3O4的化学方程式
- 2已知数据x1,x2,...,xn的方差是m,则一组新数据2x1+8,2x2+8,...,2xn+8的方差?
- 3一条公路修好800米后,剩下的长度比全长的四分之三少100米,这条路全长多少米?
- 4生命就是苏东坡的什么诗句的豁达
- 5上足下用 这个字怎么拼啊
- 6离子化合物溶解度与什么有关
- 7计算(或化简、求值): (1)(1/3)0÷(-1/3)-3. (2)20072-2006×2008. (3)(x+y+4)(x+y-4). (4)(3x2-4y3)(-3x2-4y3)-(-3x2-4y3)2.
- 8是填空题 题旁边画了个篮球 I want to jion the ____ club.请问填什么 basketball 还是 spo
- 9英语:earn as much money as possible
- 10画出函数y=x²-4的图像(光写出坐标就行)