作业帮急 Have you ever helped disabled children?把have换成did有影响吗?为什么是helped呢？
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急 Have you ever helped disabled children?把have换成did有影响吗?为什么是helped呢？
急 Have you ever helped disabled children?把have换成did有影响吗?
为什么是helped呢？
急 Have you ever helped disabled children?把have换成did有影响吗?为什么是helped呢？
用have 是完成时 表示到目前为止一种持续的状态
用did 是过去式 表示过去发生的动作
当然了。did 表示过去式，怎么后面还能用helped？
你好，首先把这句话变成陈述句，如下：
I have ever helped disabled children.
句中 ever 是曾经，去掉之后就是：have helped （现在完成时）
如果把 have 改成 did 后，陈述句 应该是：
I helped disabled children
句中 helped （一般过去时）<...
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你好，首先把这句话变成陈述句，如下：
I have ever helped disabled children.
句中 ever 是曾经，去掉之后就是：have helped （现在完成时）
如果把 have 改成 did 后，陈述句 应该是：
I helped disabled children
句中 helped （一般过去时）
两种时态不一样
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造句：Have you ever.
Have you ever heard
Have you ever
have you ever与have you ever been的区别
you have ever said before和you have ever said
连词成句 English learning job will you find a help good been have ever to you Beijing连词成句English learning job will you find a help goodbeen have ever to you
英语造句have you ever
“Have You Ever Seen Me?
Have you ever seen snow?
have you ever.是什么句型
have you ever fed them?
Have you ever had these?
Have you ever been employed?
Where have you ever been?
have you ever [ ] [drink]coke?
Have you ever ( ) [study] abroad?
have you ever move house
Please help.(english-chinese translation).What's the best gift you have ever received?-----------------------------------Hurry up!Thank you!