I'm not sure if he is able to swim or not这句话是对的还是错的?急.坐等!刚考完英语,有一题I'm not sure______A you can help me with my English.B if he is able to swim or notC how soon he will be backD how long does it take to finish

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I'm not sure if he is able to swim or not这句话是对的还是错的?急.坐等!刚考完英语,有一题I'm not sure______A you can help me with my English.B if he is able to swim or notC how soon he will be backD how long does it take to finish
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I'm not sure if he is able to swim or not这句话是对的还是错的?急.坐等!刚考完英语,有一题I'm not sure______A you can help me with my English.B if he is able to swim or notC how soon he will be backD how long does it take to finish
I'm not sure if he is able to swim or not这句话是对的还是错的?急.坐等!
刚考完英语,有一题I'm not sure______
A you can help me with my English.
B if he is able to swim or not
C how soon he will be back
D how long does it take to finish the job.
我选了B.不确定正确答案,加急!坐等!

I'm not sure if he is able to swim or not这句话是对的还是错的?急.坐等!刚考完英语,有一题I'm not sure______A you can help me with my English.B if he is able to swim or notC how soon he will be backD how long does it take to finish
I'm not sure if he is able to swim or not.是错的.
应该用whether代替if.
if 不能与or not连用,只有whether 才可以.
因为I'm not sure后面要加从句,所以A也是错的,应改成I'm not sure whether/if you can help me with my English.
从句中一般都是陈述句,D中does it take to finish the job是疑问句,所以不正确.
正确答案为C.我不确定他还有多久才回来.

A you can help me with my English.
应该是a啊
可惜了

选C
B是错的，因为whether才可以配合后面的or not 使用，if不可以
A是错的，应该用could，表示不确定的语气
D是错的，因为用作宾语从句的句子要用陈述句，不可用疑问形式

选C吧
not sure 后面 + if 或者 whether 表示是否会。。。
但是只有whether 后面才可以+ or not
所以B是错的
how soon he will be back 这个是对的
后面该用陈述句

答案应该是c

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