Question

求一般现在时、一般过去时、一般将来时、现在进行时、过去进行时、现在完成时、过去完成时的标志词~~~！！

Answer 1

一般现在时：every day, every year, always, usually, often , sometimes , hardly ,never等。
一般过去时: ago, yesterday, last year, last week, just now (刚才), the day before yesterday(前天）, in 1999 , in the past (在过去）
一般将来时：tomorrow, next year , next week ,the day after tomorrow (后天）, in the future
现在进行时：now, Look ! Listen ! It's 7 o'clock , we are doing ...... (现在几点了我们正在...）
过去进行时：at this time of yesterday (在昨天的这个时候）at that time , at 7 o'clock last night现在完成时：already, ever, never, yet, so far(到目前为止）, in the past/ last few years
(在过去的几年间），over the years （近年来）
过去完成时：1. by the end of last year.
e.g. By the end of last term, we had learned 5000 new words.
2. By the time sb. +动词过去式
e.g. The bus had already left by the time I got there.
3. 宾语从句
过去完成时的动作发生在过去的过去。 He said he had been to Beijing twice.
他说他已经去过北京两次。
（因为“说”said就是过去式，而去北京的动作发生在说said 的过去，
所以用过完而不用现完。）

Answer 2

一般现在时用动词原形或第三人称单数形式。标志词有：every day, evry Sunday, often, always, usually, sometimes , on Sundays, on weekdays等等。

一般过去时用动词的过去式。标志词有：yesterday, last week , last month, last year, two years ago
.
一般将来时用will +v(原形）.标志词：tomorrow,in the future, next week , next Sunday.

现在进行时am/is /are+v-ing形式。标志词：now,at the moment Look!, Listen!

过去进行时：was/were+doing 标志词：at that moment, at this time of yesterday, at eight last night.

现在完成时：have/has+动词的过分词.标志词：ever,never, since,already,yet,before.twice, once ,three times.

过去完成时：had+动词的过去分词。此时态是发生在过去的过去，就是在过去之前发生的事。通常用在从句里。有时也有标志词：by the year 2000。

Answer 3

一般现在时：often sometimes always never hardly ever usually every 。。。
一般过去时：yesterday, last year, last..., in 2011 , in July ...
一般将来时：next year, tomorrow
现在进行时: now
现在完成时： already yet