作者:opple 时间:2022-12-27 阅读:()
I'm not interested in whether she'll come or not.她来不来,我不感。
3.直接与or not连用时。例如:
I can't say whether or no the will come on time.他能否准时来,我说不准。
I don't know whether or not they will come to help us.我不知道他们是否会来帮助我们。
4.在动词discuss后面的宾语从句中。例如:
We discussed whether we had a sports meeting next week.我们讨论下周我们是否举行运动会。
5.宾语从句提前时只能用whether。例如:
Whether this if 和 whether用法 is true or not,I can't say.这是不是真的,我说不准。
6.引导位于句首的主语从句或表语从句用 whether。例如:
Whether he is right or wrong is a question.他是对还是错仍是个问题。
The question was whether he went there last night.问题是他昨晚去没去那里。
那么,在什么情况下用if不用whether呢?
[老师]在下面三种情况下用if不用whether:
1.引导条件状语从句,if意为“如果”时,不可用 whether代替。例如:
We will go swimming if it is fine tomorrow.如果明天天气好,我们将去游泳。
We'll go hiking ifit doesn't rain tomorrow.如果明天不下雨,我们将去徒步旅行。
2.引导否定概念的宾语从句时一般用if。例如:
He asked me if I hadn't finished my homework.他问我是否没有完成作业。
3.状语从句中的even if(即使)和as if(好像)中的if不能用whether来替代。例如:
I'll not let you watch TV even if you're free.即使你有空,我也不让你看电视。
He talks as if he knew all about it.他说话的口气好像他全部都已知道了。
OK,讲了这么多,不知你听明白了吗?
听明白了。Thank you,sir.
篇7:英语语法知识点
英语语法:equipment 可数吗
equipment是不可数名词,作“装备”,“设备”解。不能说equipments或an equipment。
例如:The building is supplied with modern office equipment.
这幢楼配备了现代化的办公设备。
You will be satisfied with the kitchen equipment here.
你一定会对这里的厨卫设备感到满意。
I need three pieces of equipment.
我需要三件设备。
We have lots of factories with modern equipment.
我们拥有许多设备现代化的工厂。
Radar equipment helps us a lot in our daily life.
雷达装置在日常生活中颇有用处。
英语语法:clothes 和 clothing 可数吗
clothes 和 clothing 均可表示“衣服”,用作“衣服”的统称,但在用法上有差别:
1.clothes 是一个没有单数形式的复数名词, 其前不可加不定冠词,也不可加数词,但可用 some, these, those, many, few 等词修饰。如:
正:those clothes / few clothes / many clothes
误:a clothes / two clothes / three clothes
2. clothing 是不可数名词。如:
They wear very little clothing. 他们衣服穿得很少。
3. 比较而言:clothes 的含义比较具体,而 clothing 的含义则比较抽象。从语体上看,clothing 比 clothes 更正式。比较:
I changed my clothes. 我换了衣服。
He is washing his clothes. 他在洗衣服。
Our clothing protects us against the cold. 我们的衣服可以御寒。
We are well provided with food and clothing. 我们吃得好,穿得好。
若不考虑其细微区别,两者常可换用(注:一个是复数,一个不可数)。如:
He spent a lot of money on clothes [clothing]. 他花了许多钱买衣服。
英语语法:homework, housework 可数吗
(1) homework, housework 为不可数名词,不可加 s。
例如:我今晚作业很多。
正 I have a lot of homework tonight.
误 I have a lot of homeworks tonight.
(2) “做作业”动词用 do,不用 study, make 等词。
例如:我必须做作业。
正 I must do my homework.
误 I must make my homework.
常用口语:
称赞别人在会议、演说等时有备而来,可说 “I can see that you have done your homework.”“我看得出来你做了你的家庭作业 (你是有备而来)”。
homework 与 housework 比较用法
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