現(xiàn)在完成時難點瞬間動詞轉(zhuǎn)換成延續(xù)性動詞

1、精選優(yōu)質(zhì)文檔-傾情為你奉上現(xiàn)在完成時之瞬間動詞轉(zhuǎn)變成延續(xù)性動詞1、 forsince:1) for+一段時間，常常可以發(fā)現(xiàn)for+數(shù)字，for three months for a long time for many years 2) Since+時間點，常常可以發(fā)現(xiàn)a. since+月份，年份，表示時間的幾點 since September since 1990 since 7 oclockb. since+一段時間+ago； since two years ago since ten months agoc. since+ last+. since last month since la

2、st year2、 現(xiàn)在完成時的結(jié)構(gòu)式 hashave done 請注意第三人稱：shehe人名.+has 3、 當(dāng)句子為肯定句，且居中出現(xiàn)forsince的時候，句中的時態(tài)要用現(xiàn)在完成時，且句中的動詞要用延續(xù)性動詞。當(dāng)句子為否定句時，句中的動詞可以為瞬間動詞，表示某個動作不發(fā)生的狀態(tài)已經(jīng)持續(xù)了.4、 在有forsince的現(xiàn)在完成時的從句中，如何將瞬間動詞轉(zhuǎn)換成延續(xù)性動詞以borrowkeep為例子They borrowed it last week. They have kept it since last week.分析：1） 我們已經(jīng)知道現(xiàn)在完成時的標(biāo)志就是hashave done，因

3、此第一步就是看主語，主語時They，我們選擇have done。2） 因為borrowkeep.而keep過去分詞：kept，因此，have borrowed就需要改成have kept.3） Since后面只能接時間點，而last week就是一個時間點，因此，since后面直接填寫last week。5、 ?？嫉乃查g動詞： 原形 過去式 過去分詞 動詞原形 動詞過去分詞1. die-be dead die died died be dead been dead2. borrow-keep borrow borrowed borrowed keep kept3. leave-be away

4、from leave left left be away from been away from4. buy-have buy bought bought have had5. begin-be(on) begin began begun be been6. join-be a member of join joined joined be a member of been a member of be in join joined joined be in been in7. become-be become became become be been8. Openclose-be open

5、 open opened opened be open been open9. finish-be over finish finished finished be over been over10. put on-wear put put put wear worn11. catch a cold-have a cold catch caught caught have had12. go to-be in go went gone be in been in13. get to know-know get got got know known14. Arrive inat-be in arrive arrived arrived be in been in15. Movecomeget to-be in 16. go out-be out go went gone be beenMovecomeget to-be in be in been in舉例Mr. Smith came to this school in September.Mr. Smith _has_ _been_ at this achool_since_ September.分析：1, come-came-come2, 本來應(yīng)該是填寫has come to，但是c