1.if you _______more about giving first aid,you______us had known,could have helped2.Never _____such an animal as Jim described after his coming back from the New Zealand.have i heard 还是 did i hear,还是had i heard问:1中had known是根据could

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1.if you _______more about giving first aid,you______us had known,could have helped2.Never _____such an animal as Jim described after his coming back from the New Zealand.have i heard 还是 did i hear,还是had i heard问:1中had known是根据could
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1.if you _______more about giving first aid,you______us had known,could have helped2.Never _____such an animal as Jim described after his coming back from the New Zealand.have i heard 还是 did i hear,还是had i heard问:1中had known是根据could
1.if you _______more about giving first aid,you______us had known,could have helped
2.Never _____such an animal as Jim described after his coming back from the New Zealand.
have i heard 还是 did i hear,还是had i heard
问:1中had known是根据could have helped 往前推一个时态得出来的.
那么在2中,是不是也可以用这种方法,把described往前推一个时态,得出 had i heard..为什么?

1.if you _______more about giving first aid,you______us had known,could have helped2.Never _____such an animal as Jim described after his coming back from the New Zealand.have i heard 还是 did i hear,还是had i heard问:1中had known是根据could
是的 因为过去完成时态就是过去式之前的事件发生的动作
只要是一个动作发生在过去那个动作之前 那个在前面的动作就可以用过去完成时态哈

关于非谓语动词的语法题目1.If you wave your book in front of your face,you can feel the air_______against your face.答案为moved 为什么不是moving?2._______more attention,the trees could have grown better.答案为given 为什么不 关于非谓语动词的语法题目1.If you wave your book in front of your face,you can feel the air_______against your face.答案为moved 为什么不是moving?2._______more attention,the trees could have grown better.答案为given 为什么不 1.if you _______more about giving first aid,you______us had known,could have helped2.Never _____such an animal as Jim described after his coming back from the New Zealand.have i heard 还是 did i hear,还是had i heard问:1中had known是根据could _______more you eat,________fatter you will be.A.A,a B.The,a C.A,the B.The,the if you damn you!If you if you can.you if you want you 用there be完成下列句子What do you think _______ in our city in ten years?New term is coming and _______many new school things in my pencil box._______more buses in the future?No,_________. if you want you you 1.if you want ,i could type something 改同义句if you want i could ( )( )( ) If you like,if you love like if you may和if you 英语翻译1.if you do not work hard ,_______________________.2.if you climb that tall tree ,______________________.3.if you know the answer ,_______________________.4.if you are ill ,________________________________.5.if you play in the classroom,_ if you .you might.造句, if you.you will.造句 If do you want ,you If you want.you can.