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Unit 1 Past and presentGrammar I ate my breakfast at 6:30 this morning.I have already had my breakfast. (I am full now.)I saw The life of Pie a month ago.I have already seen The life of Pie .(I know something about it now.)You finished your holiday exercises in the winter holiday.You have already finished them. I closed the door just now.I have just closed the door. (The door is closed now.)我们还用现在完成时 (Present perfect tense) 来谈论 :1, 过去发生仍与现在有某些联系或有影响的动作或情况。• I have been a teacher for 25 years. （时间段）• I am an English teacher.• I have been a teachersince I left my college\1988\25 years ago.( 过去的时间点 )I became a teacher in 1988\25 years ago.You learned English 5 years ago.You have learned English since 5 years ago\ you were in primary school. （过去的时间点）You have learned English for 5 years. （时间段）我们用现在完成时 (Present perfect tense) 来谈论 :2, 过去发生延续到现在的动作或情况。现在完成时 (Present perfect tense) have/ has + PP （动词的过去分词）Subject ( 主语 )have / has + (not)（助动词）past participle( 过去分词 ) I/You/We/They have (not) moved. He/She/It has (not) moved. Have/ Has + 主语 + 动词的过去分词HaveI/you/we/theymoved? Has he/she/itYes ，I/you/we/they have.he/she/it has. No ，I/you/we/they have.not/haven’t.he/she/it has not/hasn’t. 一般疑问句Underlining the present perfect tense in the following sentences 1 They have learned about 20 Chinese songs since they came to China. 2 Has he played computer games for one hour? Yes, he has.3 My daughter has watched the game a few times. Forming the past participle of verbsMost verbs+ edwash→washedVerbs ending in e+ dlive→livedVerbs ending in a consonant + y- y + iedstudy→studiedShort verbs ending in a vowel...