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 He be married,but I'm not sure. I'm not sure he can swim 改为否定句 I'm not sure 快 I'm not sure yet. I'm not sure()( 至今) I was not sure if he was really interested or if he____polite.为什么用will j I am not sure( )he will come or not空格中填whether 还是if? I'm sure I am not wrong 英语语法：I'm not sure if he will come.是什么从句?另：此句中，到底能用if来替代whether吗？ 英语翻译I'm not sure if it is good or not ___ ___ ___ I'm not sure if it will rain tonight.I'm not sure if/whether it will rain tonight.为什么不是is going to ,而要用will? I'm not sure which room he lives in.这个句子为什么不能写作 I'm not sure which room does he live in.或者I'm not sure in which room does he live . 有没有I’m not too sure? NOW, I'm not sure 什么意思 为什么没有I’m not too sure? I'm not sure when I should go.同义句 I'm not sure when( )( ). I'm not sure whether/if robots will make humans lose their