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be动词都有am/is/are/was/were，那么，它们的具体用法是什么呢?下面小编告诉你英语系动词be的用法，大家一起来看看吧!英语系动词be的用法：第一，be动词都有：am/is/are/was/were。都表示“是”的意思，在句子中充当谓语动词的成分。第二，在一般现在时中，当主语是第一人称的时候，谓语动词可以用am。比如：I am a boy.我是一个男生。第三，在一般现在时中，当主语是第三人称he/she/it，又或者是名词单数的时候，后面的谓语动词可以是is。比如：He is a student.他是一个学生。The apple is red.这个苹果是红色的。第四，在一般现在时中，当主语是they/we，又或者是名词复数时，后面的谓语动词可以是are。比如; We are good friends.我们是好朋友。The trees are tall.这些树是高的。第五，在一般过去时中，当主语是it/he/she/I/名词单数时，谓语动词可以用was，不然就用were。比如：It was red dog.它是一只红色的狗。They were very happy.他们很高兴。英语中be动词的用法：一、系动词be作为系动词(也叫连系动词，link verb)的be，是英语学习者接触最早的用法，而且其用法也很多。其基本含义为“是”，基本用法结构为“主语+be+表语”，也就是我们常说的主系表结构，其中的表语一般都由名词、形容词、数词或表地点、时间等的短语来充当。系动词be有各种时态的变化，也会和情态动词连用。(一)be的时态变化系动词be会有一般现在时、一般过去时、一般将来时、现在完成时、过去完成时等的时态变化。如：He isa student.They werein the park yesterday.It will be cloudy tomorrow.He has been ill for six days.It had been three hours before she left the hat shop.(二)be与情态动词的连用其用法为：情态动词+系动词be原形。如：It must be Lucy"s book. Her name is on the cover.It can be very difficult for us to memorize too many words within such a short time.She should be here on time tomorrow.更多有关系动词的用法，大家可以戳这里：一站式珍藏：英语九大词类二、助动词be作为助动词，be没有具体含义，而是与主要动词一起构成句子的谓语动词。这种情况下，be主要用来构成进行时和被动语态。(一)进行时态中的be此时，be可以与主要动词的现在分词一起，构成各种进行时态。如：He is reading in the library now. (现在进行时)She wasswimming in the river this time yesterday. (过去进行时)They will be arriving in Beijing tomorrow. (将来进行时)We have been learning English for ten years. (现在完成进行时)(二)被动语态中的be助动词be能够与主要动词的过去分词一起构成被动语态，即be done结构。如：Chinese iswidely used around the world nowadays.The window wasbroken by the naughty boy just now.Your watch has already beenrepaired.【注意】助动词be能够构成特殊句型。如：1、be going to dobe going to do表示“打算或将要”。如：He isgoing to visit us next week.It isgoing to rain soon.2、be about to dobe about to do表示“刚要，即将”。与be going to do表“将要”不同的是，be about to do表示的是说完话后马上就要去做或是短期内马上就要去做。如：The plane isabout to take off in five minutes" time.3、be to dobe to do表示“按计划要做”。如：One night an angel came to Mary and told her that she wasto have this special boy.The new store isto be opened tomorrow.英语系动词的用法：一、系动词的简单介绍系动词就是将主语和对主语的说明部分联系起来,并对主语加以说明的词。系动词是动词的一种,本身有词义,不可单独作谓语,后面必须跟表语构成系表结构:主语+系动词+形容词(作表语)修饰主语的状态。要注意的是:如果句子是一般现在时,当主语是第三人称单数时,动词要变成单三形式。二、系动词的分类1、感官动词Feel, smell, sound, taste, touchThis flower smells very nice.2、状态系动词,表主语状态,只有beHe is a teacher.3、持续性动词,表示主语继续或保持一种状况或态度Keep, rest, remain, stay, lieHe always keeps silent at class.4、变化系动词, 表示主语变成什么样Become, grow, turn, fall, get, go, come, runHe became fat in winter holiday.其实很多系动词可以当系动词,也可以当实义动词,但用法有所不同。如:LookLook at my hand 实义动词,看She looks amazing.系动词三、下面小编举例几道题来看Some food isn"t good for us, but it good.A. tastesB. eatsC. soundsD. taste解析:根据句意,食物是尝起来,所以用动词taste。这里主语是it,第三人称单数,所以用tastes,先A.The moon cake tastes▁▁▁▁▁; it sells▁▁▁▁▁.A. good; wellB. good; goodC. well; wellD. well; good解析:taste系动词;sell实义动词。taste后要加形容词作表语,修饰月饼。而sell后加副词修饰sell本身。所以taste +good; sell +well.本题选A.I really enjoy the noodles and vegetables. They ▁▁▁▁▁delicious.A. stayB. feelC. tasteD. sound解析:本题根据句意来。面条和蔬菜应该是尝起来美味,所以选taste.本题选 C四、关于系动词be的一些注意问题1. be动词随主语的变化而变化。2.否定句中,要把not放在be动词am, is, are的后面3.一般疑问句中,须注意的是:A.把be 动词 am, is,are 提到句子的最前面,第一个字母大写。B.肯定回答和否定回答,在回答时要注意主语必须用代词,就是把问句中的名词用代词代替。C.问句中是"你"时,回答用"I(我)";问句中是"你们"时,回答用"we(我们)"英语连系动词的用法：(1) 状态系动词：只有be一词。如：She is always like that. 她总是那样。I am used to going about alone. 我习惯于独来独往。These shoes are too tight for me. 这双鞋我穿太小。(2) 持续系动词：表示主语继续或保持一种状况或态度，主要有keep, remain, stay, rest, lie, stand。如：I hope you’ll keep fit. 我希望你身体好。He always kept silent at meeting. 他开会时总保持沉默。The door remained closed. 门仍然关着。We can remain friends. 我们可以继续做朋友。Please stay seated. 请继续坐着。He stayed single. 他仍然是单身。(3) 表像系动词：表示“看起来好像”，主要有seem, appear, look等。如：He looks tired. 他看起来很累。He seems (to be) quite happy. 他好像很快活。The doctor seemed very capable. 那医生似乎很能干。He appeared quite well. 他显得身体相当好。He appeared taken aback. 他似乎很吃惊。She appeared perplexed. 她显得迷惑不解。(4) 感官系动词：表示“……起来”，有feel(摸起来，感觉) , smell(闻起来) , sound(听起来) , taste(尝起来，吃起来) 等。如：This kind of cloth feels very soft. 这种布摸起来很软。He looks honest, but actually he’s a rogue. 他看起来很老实，实际他是一个坏蛋。They all look alike to me. 他们的模样我看起来都一样。Everybody feels contented. 每个人都感到很满足。Ice feels cold. 冰感觉起来是凉的。Silk feels soft and smooth. 丝绸摸起来很柔软平滑。It sounds a good idea. 这听起来是个好主意。This food tastes good. 这菜好吃。(5) 变化系动词：表示主语变成什么样，主要有become, grow, turn, fall, get, go, come, run如：He became mad after that. 自那之后，他疯了。She had grown thinner and thinner. 她越来越瘦了。His cold was growing worse. 他的感冒越来越严重了。She’s growing fat. 她正在发胖。He’s grown used to it. 他对此已经习惯。When she saw this, she turned red. 她看到这，脸红了。His hair turned grey in a few weeks. 在几个星期中他头发就变灰白了。The milk will soon turn sour. 牛奶很快就会变酸。Several people fell ill, victims of blood poisoning. 几个人生病了，都是血中毒的受害者。We get wiser as we get old. 随着年岁的增长，我们也变得聪明些了。Your hair has gone quite white! 你的头发全白了!She went pale at the news. 听到这消息，她脸色变得苍白。When I mentioned it to him he went red. 我对他提及此事时他脸红了。He went mad. 他疯了The children must not go hungry. 孩子们不能挨饿。(6) 终止系动词：主要有prove, turn out(结果是，证明是) 等。如：His story proved false. 他讲的情况原来是假的。His advice proved sound. 他的劝告证明是对的。My intuition turned out to be correct. 我的直觉证明是对的。