英语中所有时态构成及区别!

英语有6种时态：the present tense - I write / I am writing a letter.the perfect tense - I have written a letter.the simple past tense - I wrote a letter./ the imperfect - I was writing a letter.the plu...不要有英语，读不懂the present tense （现在时）- I write / I am writing a letter. 我写一封信。我正在写一封信。the perfect tense （完成时）- I have written a letter. 我已经写了一封信。the simple past tense （简单过去时）- I wrote a letter. 我写了一封信。/ the imperfect - I was writing a letter. 我刚才正在写一封信。I have been writing a letter. 我一直在写一封信。the pluperfect (the past perfect) （过去完成时）- I had written a letter. 我过去已经写了一封信。/ I had been writing a letter. 我过去正在写一封信。teh future （将来时）- I will write a letter. 我会写一封信。/ I will be writing a letter. 我会正在写一封信。the future perfect （过去完成时）- I will have written a letter. 我会把信已经写好了。/ I will have been writing a letter. 我会正在写一封信。