【be动词用于一般现在时用法口诀】
我用am, 你用are, is连着他她它。
单数名词用is, 复数名词全用are。
【be动词用于一般过去时的基本规则】
1.I/he/she/it/单数名词 was…
2.we/you/they/复数名词 were…
(二)、be动词用于被动语态：
(1)一般现在时被动语态：am/is/are PP
Wine is made from grapes. 葡萄酒是由葡萄酿制的。
(2)一般过去时被动语态：was/were PP
The girl was asked some questions by her teacher. 女孩的老师问了她一些问题。
(3)一般将来时被动语态：
shall/will be PP
am/is/are going to be PP
A new airport is going to be built in Chengdu soon. 成都不久之后将修建一座新机场。
(4)现在进行时被动语态：am/is/are being PP
The Autumn Sport Meeting is being held in our school now. 我们学校正在举行秋季运动会。
(5)过去进行时被动语态：was/were being PP
His bedroom was being cleaned at ten yesterday morning. 他的卧室是昨天上午十点钟打扫的。
(6)现在完成时被动语态：have/has been PP
All of his homework has been finished. 他的所有作业都完成了。
(7)过去完成时被动语态：had been PP
The second class had been finished by the time he arrived at school. 当他到大学校时，第二节课已经上完了。
(8)将来完成时被动语态：will/shall have been PP
The new Sports Center will have been finished by October 15th. 新的体育中心将在10月15日前竣工。
