精品偷拍一区二区三区,亚洲精品永久 码,亚洲综合日韩精品欧美国产,亚洲国产日韩a在线亚洲

  • <center id="usuqs"></center>
  • 
    
  • 四大時態(tài)要有(概念、構(gòu)成、標志詞)

    四大時態(tài)要有(概念、構(gòu)成、標志詞)
    6單元的4大時態(tài)(有人能幫我的話,在提高懸賞)
    英語人氣:861 ℃時間:2019-08-20 20:43:15
    優(yōu)質(zhì)解答
    時態(tài)
    1.一般現(xiàn)在時
    (1)表示經(jīng)常發(fā)生的動作或事情,通常用 “usually,often,every day,sometimes,always,never”等詞.
    (2)基本結(jié)構(gòu):
    I / You / We / They He / She / It
    肯定句(Positive) 動詞原形(V) 動詞第三人稱單數(shù)形式(V+S)
    否定句(Negative) don’t + 動詞 doesn’t + 動詞原形
    一般疑問句(Yes/No) Do… Yes,I do.Does…(動詞原形)…?No,she doesn’t.
    特殊疑問句(wh-) What do How does she…(動詞原形)…?
    (3) 動詞第三人稱單數(shù)形式
    a.Most verbs +s walk-walks
    b.Verbs ending in a consonant +y -y +ies fly-flies
    c.Verbs ending in s,sh,ch or x +es watch-watches
    d.Others do-does ,have-has,go-goes
    2.現(xiàn)在進行時,
    (1)表示正在發(fā)生的動作,通常用“now,look”.
    (2)基本形式:be + 動詞+ing
    eg:I am(not) doing my homework.
    You/We/They are(not) reading.
    He/She/It is(not) eating.
    What are you doing?
    Is he reading?
    (3)動詞的現(xiàn)在分詞形式(do+ing)
    Most verbs +ing walk—walking
    Verbs ending in e -e + ing come—coming
    Short verbs ending in a vowel + a consonant Double
    consonant run-running
    swim-swimming
    3.一般過去時態(tài)
    (1) 表示過去已經(jīng)發(fā)生的事情,通常用 “l(fā)ast week,just now,yesterday”等詞.
    (2) be 動詞的過去式:am/is—was are—were
    I/He/she/it was(not)….You/we/they were….
    一般疑問句was,were 放在句首.
    (3)過去式基本結(jié)構(gòu)
    肯定句(Positive) 動詞過去式 I went shopping last night.
    否定句(Negative) Didn’t + 動詞原形 I didn’t go shopping last night.
    一般疑問句(Yes/No) Did …+ 動詞原形…?Did you go shopping last night?
    特殊疑問句(wh-) What did…+ 動詞原形…?What did you do last night?
    (4)動詞過去式的變化:
    規(guī)則動詞的變化:
    一般動詞 +ed planted,watered,climbed
    以不發(fā)音的e結(jié)尾 +d liked
    輔音字母加y結(jié)尾 -y+ ied study—studied,cry- cried
    重讀閉音節(jié)單詞,末尾只有一個輔音字母 雙寫最后一個字母+ed stop –stopped
    plan - planned
    不規(guī)則動詞的變化:
    原形 過去式 原形 過去式 原形 過去式 原形 過去式
    sweep swept teach taught have had go went
    keep kept think thought do did find found
    sleep slept buy bought eat ate say said
    feel felt drink drank is/am was take took
    read read give gave are were mean meant
    put put sing sang drive drove meet met
    cut cut begin began speak spoke make made
    let let ring rang write wrote see saw
    fly flew run ran ride rode come came
    draw drew sit sat hear heard tell told
    grow grew learn learned/ learnt get got know knew
    4.一般將來時
    一般將來時表示將來打算做的事或?qū)⒁l(fā)生的事情.常常與tomorrow,next Sunday等時間狀語連用.
    結(jié)構(gòu):be going to +動詞原形
    例如:I’m going to visit my grandpa next week.
    我來回答
    類似推薦
    請使用1024x768 IE6.0或更高版本瀏覽器瀏覽本站點,以保證最佳閱讀效果。本頁提供作業(yè)小助手,一起搜作業(yè)以及作業(yè)好幫手最新版!
    版權(quán)所有 CopyRight © 2012-2024 作業(yè)小助手 All Rights Reserved. 手機版