比较一般过去时与现在完成时
一般过去时的时间状语：yesterday, last week，…ago, in1980, in October, just now等，皆为具体的时间状语。
现在完成时的时间状语：for, since, so far, ever, never, just, yet, till/until, up to now, in past years, always等，皆不确定的时间状语。
共同的时间状语：this morning, tonight, this April, now, already, recently, lately 等。
I saw this film yesterday. / I have seen this film.
The car has been repaired. / The car was repaired.
比较since和for
1）Tom has studied Russian for three years. = Tom began to study Russian three years ago, and is still studying it now.
2）Harry has got married for six years. = Harry began to get married six years ago, and is still getting married now.
显然，第二句不对，它应改为 Harry got married six years ago. 或 Harry has been married for six years.
动词的语态
动词的语态一般不单独考，而是和时态、语气和非谓语动词一起考，注意以下考点。
考点一：不能用于被动语态的动词和词组
come true, consist of, take place, happen, become, rise, occur, belong, break out, appear, arrive, die, fall, last, exist, fail, succeed.
判断：The price has been risen.
The price has risen.
The accident was happened last week.
The accident happened last week.
The price has raised.
The price has been raised.
Please seat.
Please be seated.
After the fire, very little remained of my house.
不能用于被动语态的还有一些及物动词或动词短语，如：fit, have, hold, marry, own, wish, cost, notice, watch, agree with, arrive at / in, shake hands with, succeed in, suffer from, happen to, take part in, walk into, belong to等。
This key just fits the lock.
Your story agrees with what had already been heard.
系动词无被动语态，如：appear, be，become, fall, feel, get, grow, keep, look, remain, seem, smell, sound, stay, taste, turn等。It sounds good.
She dreamed a bad dream last night.
She likes to swim.
考点二：动词的主动语态表示被动意义, 而且常与well, quite, easily, badly等副词连用，如：
1. lock, wash, sell, read, wear, blame, ride , remain, keep, rent, write
Glass breaks easily. The car rides smoothly. The case locks easily. The book sells well.
I was to blame for the accident. Much work remains.
2. 在need, require, want, worth （形容词）, deserve后的动名词必须用主动形式。
The door needs repairing. = The door needs to be repaired.
This book is worth reading.
3. 特殊结构：make sb. heard / understood （使别人能听见/理解自己）等。
Explain it clearly and make yourself understood.
考点三：一些常用经典被动句型
It is said…, It is reported…, It is widely believed…，It is expected…, It is estimated… It is well known that… It is thought that…It is suggested that…It is taken granted that…
考点四：短语动词的被动语态
短语动词是一个整体，不可丢掉后面的介词或副词。
My sister will be taken care of by Grandma.
Such a thing has never been heard of before.
考点五：被动形式表示主动意义，如be determined, be pleased, be graduated （from）, be
prepared（for）, be occupied（in）, get married等。
He is graduated from a famous university.
注意：表示同某人结婚，用marry sb.或get married to sb.
He married a rich girl. / He got married to a rich girl.