8B Unit2 Integrated skills & Pronuciation導(dǎo)學(xué)案
3) we ________ just ________ (hear) from her.
4) ________ you ever ________ (watch) this film?
5) they __________ (be) busy recently.
6) ---________ he ________ (find) his watch yet? ---no, not yet.
2.用法二：表示過去已經(jīng)開始，一直持續(xù)到現(xiàn)在的動作或狀態(tài)，并且還有可能繼續(xù)下去。
常和表示從過去某一時(shí)刻延續(xù)到現(xiàn)在的一段時(shí)間的狀語連用。
如：for, since(自…以來), recently, this week, these days, until now, so far (迄今為止), over/during the last three years / in the past three years(最近三年來)。
1) for + 一段時(shí)間 i have taught english ______ three years.
2) since + 表示過去的時(shí)間點(diǎn) he has been at this school ______ 1986.
3) since + 一段時(shí)間 + ago i have known him ______ ten years ago.
4) since + 表示過去的時(shí)間狀語從句 i have lived here ______ i was born. (用一般過去時(shí))
注：其謂語動詞應(yīng)該是延續(xù)性動詞，不能用非延續(xù)性動詞。
(指該動詞可以延續(xù)一段時(shí)間，如live, work, study, teach, stay等)
(四) 現(xiàn)在完成時(shí)與一般過去時(shí)的區(qū)別
1.一般過去時(shí)只表示過去的動作或狀態(tài)，與現(xiàn)在無關(guān)。它常和確定的表示過去的時(shí)間狀語連用。如：last week, yesterday, in 1980, … ago, just now, when i came in。
現(xiàn)在完成時(shí)表示過去發(fā)生的某一動作對現(xiàn)在造成的影響，或從過去一直持續(xù)到現(xiàn)在的動作或狀態(tài)，強(qiáng)調(diào)的是現(xiàn)在。它不能和明確指出過去的時(shí)間狀語連用。
e.g. 1) i have cleaned the blackboard. (說明現(xiàn)在黑板是干凈的)
i cleaned the blackboard half an hour ago. (強(qiáng)調(diào)過去的行為，與現(xiàn)在無關(guān))
2) the teacher ________ just ________ (write) some new words on the blackboard.
the teacher __________ (write) some new words on the blackboard just now.
2.如果詢問某事發(fā)生的時(shí)間和地點(diǎn)，只用一般過去時(shí)。
e.g. ---when ________ you ________ (lose) your cat? ---i ________ (lose) it last night.
---where ________ you ________ (find) it? ---i ________ (find) it in the garden.
【教學(xué)過程】
step 1. lead-in
ask some questions to present the present perfect tense.
step 2. presentation
1. teach students how to form the past participles of verbs.
teach students to make statements and negative statements using the present perfect tense.
finish part a1 on page 14.
2. teach students to ask and answer questions using the present perfect tense.
finish part a2 on page 15.
3. talk about the typical time expressions with the present perfect tense.
finish part b on page 17.
step 3. practice
do some more exercises.