be是英语动词中比较特殊的一类动词，其使用频率很高，牵涉到各种句型、时态和语态等用法，下面小编告诉你初一英语系动词be的用法，大家一起来看看吧!
初一英语系动词be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.
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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.
there be+宾语+过去分词:
■过去分词表示一种被动关系，同时表示动作已经发生:
There is nothing written on it. 上面没写东西。
There were ten people killed in the accident. 事故中有10人丧生。
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■有时过去分词也可表示一种状态(可转换成被动结构):
There were some old men seated (=who were seated) in the back. 有些老人坐在后面。
There is a red car parked (=which is parked) outside the house. 房子外边停着一辆红色汽车。
there be+宾语+不定式:
■不定式通常表示动作尚未发生
There was nobody to look after the child. 没有人照顾这孩子。
There was a large crowd to send him off. 有一大群人要来给他送行。
There was so much to lose that we couldn’t take any risks. 可能会有很大的损失，因此我们不能冒险。
■当其中的宾语与其后的不定式为被动关系时，可用主动表被动，也可用被动式:
There is much work to do [to be done]. 有许多工作要做。
■有时其中的不定式为系表结构:
There is nothing to be afraid of. 没什么可怕的。
What was there to be afraid of. 有什么可怕的?
There’s nothing to be ashamed of. 没有什么值得羞愧的。
there be+名词+非谓语动词:
1. there be+宾语+现在分词:现在分词表示主动关系，同时表示动作正在进行:
There is someone waiting for him. 有人在等他。
There was a man standing in front of me. 我前面站着一个男人。
There were some children swimming in the river. 有些小孩在河里游泳。
There were a group of young people working in the fields. 有一群青年在地里劳动。
有时现在分词可表示一种状态:
There’s a piano standing against the wall. 靠墙有一架钢琴。
There’re a lot of difficulties facing us. 我们面前有很多困难。
There is a door leading to the garden. 有一座门通往花园。
有个别现在分词用于该结构时可以表示将来(正如它们可用进行时表示将来一样):
There are ten people coming to dinner. 有10个人来吃晚饭。
2. there be+宾语+过去分词:过去分词表示一种被动关系，同时表示动作已经发生:
There is nothing written on it. 上面没写东西。
There were ten people killed in the accident. 事故中有10人丧生。
有时过去分词也可表示一种状态(可转换成被动结构):
There were some old men seated (=who were seated) in the back. 有些老人坐在后面。
There is a red car parked (=which is parked) outside the house. 房子外边停着一辆红色汽车。
