97骚碰,毛片大片免费看,亚洲第一天堂,99re思思,色好看在线视频播放,久久成人免费大片,国产又爽又色在线观看

if如果句型的用法總結

回答
瑞文問(wèn)答

2024-10-04

if的用法:表示條件,意思是如果;表示虛擬,意思是假如;表示是否的含義,和whether相同用法,連接賓語(yǔ)從句。

擴展資料

  1.(表示條件)如果 ,主句用將來(lái)時(shí),if從句用現在時(shí)表示將來(lái)

if如果句型的用法總結

  He will come if you invite him.

  如果你請他,他會(huì )來(lái)的.

  2.(表示虛擬)假如,要是

  時(shí)態(tài):可以表示過(guò)去,現在和將來(lái)的情況.它的基本特點(diǎn)是時(shí)態(tài)退后.

  a.同現在事實(shí)相反的假設.

  句型 :條件從句 主句

  一般過(guò)去時(shí) should( would) +動(dòng)詞原形

  If they were here,they would help you.

  b.表示于過(guò)去事實(shí)相反的假設.

  句型:條件從句 主句

  過(guò)去完成時(shí) should(would) have+ 過(guò)去分詞

  If she had worked harder,she would have succeeded.

  The rice would not have been burnt if you had been more careful.

  If my lawyer had been here last Saturday,he would have prevented me from going.

  If he had come yesterday,I should / would have told him about it.

  含義:He did not come yesterday,so I did not tell him about it.

  If he had not been ill and missed many classes,he would have made greater progress.

  含義:He was ill and missed many lessons,so he did not make greater progress.

  c.表示對將來(lái)的假想

  句型:條件從句 主句

  一般過(guò)去時(shí) should+ 動(dòng)詞原形

  were+ 不定式 would + 動(dòng)詞原形

  should+ 動(dòng)詞原形

  If you succeeded,everything would be all right.

  If you should succeed,everything would be all right.

  If you were to succeed,everything would be all right.

  3.是否 = whether 連接賓語(yǔ)從句

  I wonder if she is ill.

  不知她是否病了.

达拉特旗| 雅江县| 南城县| 湟中县| 萨迦县| 泽州县| 新竹县| 金湖县| 前郭尔| 兴安县| 阜阳市| 连江县| 特克斯县| 拜城县| 南雄市| 杭锦后旗| 崇文区| 年辖:市辖区| 梨树县| 米林县| 出国| 沈阳市| 金华市| 瓦房店市| 阿鲁科尔沁旗| 奇台县| 新昌县| 新昌县| 广饶县| 平安县| 绥德县| 都江堰市| 葫芦岛市| 琼结县| 大安市| 奉新县| 灵寿县| 沂南县| 沙雅县| 南郑县| 原阳县|