tenses

各種時態Tenses的溫習：
1. 主要分為過去式 Past tense，現在式Present tense 及將來式 Future tense 三
類。
2. 而每一類可再細分為簡單式 Simple，進行式Continuous及完成式Perfect
三種時態。
3 x 3=9，因此英文有九種基本的 tenses 。
Past ：Simple past tense （簡單過去式）You jumped. I jumped.
Past continuous tense （過去進行式）You were jumping. I was jumping.
Past perfect tense （過去完成式）You had jumped. I had jumped.
Present：Simple present tense （簡單現在式）You jump. I jump.
Present continuous tense（現在進行式）You are jumping. I am jumping.
Present perfect tense（現在完成式）You have jumped. I have jumped.
Future ：Simple future tense （簡單將來式）You will jump. I shall jump.
Future continuous tense （將來進行式）You will be jumping. I shall be jumping.
Future perfect tense（將來完成式）You will have jumped. I will have jumped.


假如句子中沒有特別的提示，一般多數是過去式。
如果有yesterday，last week，2 days ago 等字眼，便明顯是了。
有often，always，never，sometimes…….等字，便是簡單現在式（simple present）
有now，Look！是現在進行式：is/am/are + ing
見到since 1983，since 4 o’clock，since last summer…….或for three years，for 2 hours，for a week…….等，便是完成式（perfect tense）
當你談及兩件過去（past）的事情，而兩件事有先後之分的話；較早發生的一件事，便用過去完成式（past perfect）
一些在過去開始，而到現在仍在進行中的事情，便用present perfect
e.g. 1 After he had brushed his teeth，he had breakfast.
刷牙，past perfect 吃，simple past
e.g. 2 She has been a DJ since she left school.
present perfect simple past
（自她離校起，她便是一位DJ。）

present perfect tense: the things that just happened

has/have +pp
e.g. has gone

past tense, the things that happened long time ago
eg.. went

Past perfect the things that happened before another action that happened in the past

e.g had +pp
had gone