while 【】on the street,she saw a wallet【】on the ground

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while 【】on the street,she saw a wallet【】on the ground
1.walked,lay 2.walking,lying 3.walked,lying 4.waking ,lay 为什么不是4,

答案：2.
翻译：当她正在街上散步时,她看见一个钱包正躺在地上.
1.第一空考查状语从句的省略：
如果状语从句的主语和主句主语相同,且从句的谓语以be动词开始,则可以把状语从句的主语和be动词一起省略.
所以：while walking on the street = while (she was) walking on the street
从句主语和主句主语一样,都是she,且she和walk之间为主动关系,再结合从句的时态,所以为she was walking,这样可以把she was一起省略.
由此排除1/3.
2.saw a wallet lying on the ground为“感官动词saw + 宾语a wallet + 宾语补足语”结构.
宾语a wallet和宾语补足语动词lie“躺”之间为主动关系（lie表示“躺/位于”时是不及物动词,不没有被动语态）,且根据句意,lie on the ground在当时正在进行,所以用lie的现在分词lying做宾语补足语,排除4.
3.lay为lie“躺/位于”的过去式,只能做句子的谓语,不能做宾语补足语.
lay同时也可以是动词原形,但是此时它的意思是“产蛋/卵；放置/摆放”,且为及物动词.如果用在此题中,a wallet和lay之间就构成被动关系（钱包是被放置在地上的）,必须使用其过去分词laid才可以.

While( )on the street,she saw a wallet( )on On the Tuesday ,I saw a wallet on the ground哪里错了 on my way to school ,I saw a wallet on the ground and I pick The boy saw a wallet on the ground ,he ___(look around) but 1.On our way home,we saw a wallet on the street corner.（保持原意 She saw a bag on the ground 保持句意 She saw a pen on the ground and____? Yesterday I saw a wallet l___ on the ground when I was walki She found a wallet ____(lie) on the ground.并简单讲讲. 英语填空1.She noticed a wallet ______ on the ground.(lie)2.I don I found a wallet on the ground . 就on the ground提问 He ( ) his wallet on the ground.

while 【 】on the street,she saw a wallet【 】on the ground

while 【】on the street,she saw a wallet【】on the ground