大家好，今天小编来为大家解答activity可数吗这个问题，活动英语可数吗很多人还不知道，现在让我们一起来看看吧！
一、activity 是不是错了, 怎么不加S
activity有时不可数，有时又可数，有时用复数形式，其基本规律是：
1.若是指一种繁忙或充满活力的状态，则通常不可数。如：The construction site was a hive of activity.建筑工地上一片繁忙。
2.若是指具体所做的事情，如工作、娱乐、消遣等，则是可数的（可连用不定冠词或用复数形式）。如：social activities社会活动。
activity记忆方法：activity相关的词根或词缀是: act activity。复数形式: activities。所属分类: CET4TEM4考研CET6。使用频率:星级词汇。
二、请问大神为什么这句话的activity不用复数
1、此处activity为不可数名词，意思是身体活动时肌肉收缩放松。
2、《牛津高阶双解英汉辞典》说明，activity有两种意思要为不可数名词，一种是活动、热闹状况、活跃，一种是身体活动时肌肉收缩放松。
3、activity的常见形式为可数名词。如下所示：activity英[ækˈtɪvəti]美[ækˈtɪvɪti] n.活动;活跃，敏捷;活动力;教育活动; [例句]You can take part inactivitiesfrom canoeing to birdwatching.你可以参与从划独木舟到观鸟等各种活动。
三、environment可数还是不可数 原因
名词，中文意思是“环境”，但是分两种情况：
1.如果是说“环境”这个概念的、抽象的意思(就是说大自然这种意思的环境)，比如保护环境、环境卫生，此时environment不可数名词。你想，说“保护一个环境”---中文也不通吧:)
2.如果是说具体的环境，比如一个陌生的新环境（这里有人有楼等等东西，是由很具体的东西组成的)，此时environment就是可数名词。
四、it可以指代不可数名词吗
表达以下概念:指代前文提到的事物，前文中的this, that；替代前文中的内容；指代一位性别不明的小孩或未知的人；指代未指明但谈话双方都知道的那件事；指代时间、天气、气候、距离等自然现象……
替代作主语的从句、动词不定式、动名词，而把真正作主语的从句、动词不定式、动名词置于句尾。
1.代作主语的动词不定式，其句型为
(1) It be adj.(for sb.) to do sth.
此处adj.通常为描述事件的形容词：easy, difficult, hard, necessary, unnecessary, possible, impossible, likely, unlikely, right, wrong, important, unimportant, legal, illegal, well-mannered, ill-mannered, polite, impolite, clear, obvious, certain, suitable, proper, fit, useful, useless, dangerous…
例 It is illegal(for a teenager) to drive a car without a license.
(2) It be adj. of sb. to do sth.
此处adj.通常为描述人的形容词：kind, unkind, nice, rude, cruel, considerate, thoughtful, thoughtless, careful, careless, silly, foolish, stupid, clever, wise, crazy.
例 It‘s kind of you to help me with the problem.
(3) It替代作主语的动名词的常见句型
It‘s(well)worth one‘s while doing/to do…
It‘s(well)worth while doing/ to do
例 It‘s no use crying over spilt milk.
2. It替代作主语的从句常见句型
例 It is no secret that the president wants to have a second term at office.
It‘s surprising that…(should)………竟然……
It‘s a pity/shame that…(should)………竟然……
例 It‘s important that you should apologize to her for your rudeness.(=It‘s of much importance that you should apologize to her for your rudeness.)
(3) It verb sb.+ clause= It is v-ing+ clause
It+surprise/delight/interest/disappoint/worry/disturb/annoy/amaze
/bother/concern/frighten/please/anger sb. that…
例 It worried me that she drove so fast.(= It was worrying that she drove so fast.)
(4) It verb(to sb.) that…= sb/sth verb to do
(verb= appear, seem, come about, emerge, follow, chance, happen, occur, transpire, turn out, work out)
例 It(so) happened/chanced that they were out.(= They happened/chanced to be out.)
(5) It is v-ed that…=sb/sth is to do
(verb=say, report, think, believe, hope, expect, agree, accept, decide, determine, intend, plan, understand, know）
例 It is said that the couple have gotten divorced.(=The couple are said to have gotten divorced.)
(6) It is v-ed that…(should)…
(verb=demand, request, require, order, suggest, advise, recommend
例 It is suggested that they should begin with the third question.
1. It takes sb.… to do…(=sb takes…to do…)某人用多长时间做某事
例 It took the men a week to mend our roof.(= The men took a week to mend our roof.)
2. It‘s(just)(un)like sb. to do…（不）像某人做某事的风格
例 It was(just) like him to think of helping us.
3. It‘s(about/high) time that… should/v-ed…是该做某事的时候了
例 It‘s(about/high) time that we should take action.
4. It‘s the x-th time(that)… have v-ed…第几次做某事了
例 It‘s the third time that he has failed the driving test.
5. It is/has been… since…continuous v-ed(延续性动词)某动作已有多长时间不发生了
例 It‘s 10 years that he lived here
6. It was(not)… before…过(不)了多长时间某动作发生了
例 It was not long before they arrived.
用来替代作宾语的从句、动词不定式、动名词，而把真正作宾语的从句、动词不定式、动名词置于句尾。
1. verb+ it+ adj./noun(for/of) to do/clause(verb=think, believe, suppose, consider, feel, make, keep…)
例 I think it hard for you to do the task on your own./I think it hard that you‘ll do the task on your own.
2. verb+it+adj./noun(one‘s) doing(adj.=useless/worth/worthwhile)(noun=no use/no good/worth one‘s while/a waste of time/money/energy/words)(verb=think, believe, suppose, consider, feel, make, keep…)
例 I‘ll make it worth your while telling me about his secret.
3. verb+it+ important/unimportant/necessary/unnecessary/natural/essential that…(should)…
verb+it+of much/great/no/little importance that…(should)…
(verb=think, believe, suppose, consider, feel, make, keep…)
例 I think it important that you(should) attendthe conference.
4. verb+ it+ as+ noun/adj.+ clause(verb=accept, regard, take, see, view)
例 The lecturer takes it as encouraging when so many students attend his lecture.
owe it to sb. that…把…归功于…
leave it to sb that…把…留给某人去做
take it for granted that…想当然
例 Don‘t bother to arrange anything. Just leave it to me to sort out.
6. It用在不能直接跟宾语从句的动词后面，尤其是表示好恶的动词后，enjoy, like, love, dislike, resent, hate, don‘t mind, be fond of, feel like, see to宾语从句紧跟it之后
例 I hate it you can swim so well and I can‘t.
7. It用在不能直接跟宾语从句的介词后面，宾语从句紧跟it之后（except that例外）
例 I‘m for it that you will follow their advice.
It is/was+被强调部分+ that(who)…强调句型用来强调谓语动词以外的任何句子成分。当被强调部分是人时也可以用who。
在使用强调句型时需注意以下几点：
例 When was it that he changed his mind to take part in the activity？
2.在强调原因状语从句时，只能强调由because所引导的从句
例 It was because he was ill that he didn‘t come to school yesterday.
3.在强调not… until结构时必须把not与until一起放到被强调的位置上
例 It was not until she took off her dark glasses that I realized she was my brother.
4.注意强调句型与定语从句的区别
例 It was at 7 o‘clock that he came here yesterday.(强调句型)
It was 7 o‘clock when he came here yesterday.(定语从句)
五、activity有积极的意思吗
1、activity的基本意思是“活动性，活力”，指人或事物本身所固有的活力，此时为不可数名词。
2、activity也可指人们为了达到某种目的而从事“繁忙的〔充满活力的〕活动”或“工作，消遣”等，此时activity为可数名词，常用于复数形式。
3、physical activity身体活动，体育活动；体力活动
4、outdoor activity户外活动，室外活动
5、Parentsencourageeveryactivityimaginable.
6、n.活动；运动；动作；［音］乐章
7、support a movement支持一项运动
8、take part in a movement参加运动
9、perform a movement演奏一个乐章
10、Theywere watchinghereverymovement.
六、activity词性转换
activity n活动，活跃，活动性；（activities） 1、active adj活泼的，积极的；形容词，在句子中用在名词前面，作定语。
His son is an active boy,他的儿子是一个活泼的孩子。
The students played an active part in the May-4th Movement.
学生们在五四运动中起了积极作用。
2、actively adv活泼地，积极地，；副词，在句子中修饰动词，作状语。
She is actively looking for a job.她正在积极地寻找工作。
3、activity n活动，活跃，活动性；如金属的活动性，恐怖活动等。
Do you like the activity?你喜欢这个活动吗?
关于activity可数吗的内容到此结束，希望对大家有所帮助。
