tense一問~~~

Past明顯是過去式, 當見到什麼ago, 昨天, 往年等等也應該用:

I was crying--> past perfect tense
I had cried--> past perfect continuous tense

用什麼要視乎情況, 例: I was crying myself to sleep last night或 I had cried myself to sleep last night也可. 前者比較生動, 後者像是在做記錄. 但如果是 After I was crying, I went to bed 或 After I had cried, I went to bed, 前者的文法顯得十分古怪 (反而後面那句是正確的)

Present是現在式, 再加上perfect就是正在進行中:

I am cryng--> present perfect tense
I have cried--> present perfect continouns tense

前一句應該十分清晰, 是用於即時發生的事: I'm writing, I'm eating, I'm playing, I'm leaving, etc. 如果有3人在一起, 1人剛剛不發一聲便離開, 那麼其中一人可以對未離開的人說 He has left without saying goodbye. 就是正在發生的事件, 有連貫性的, 不是昨天, 不是1小時前, 可當作是在看電影, 作用就是要形容一些眼前的事物正在做什麼.

Tense
Present Simple--- I eat
Present Progressive--- I am eating

Past Simple---- I ate
Future--- I will eat I am going to eat
Past Progressive--- I was eating
Rule: Add " s " or "es " to He, she, It

Present Simple Tense
1. Use it with habitual actions
2. To form it add " s " or "es " to 3rd person singular He, She, It