if you don't be careful,you will fail in the exam.和if you aren't careful.哪個對?
if you don't be careful,you will fail in the exam.和if you aren't careful.哪個對?
if you don't be careful,you will fail in the exam.和if you aren't careful,you will fail in the exam.
if you don't be careful,you will fail in the exam.和if you aren't careful,you will fail in the exam.
英語人氣：414 ℃時間：2020-01-31 10:49:50
優(yōu)質(zhì)解答
正確的是：if you aren't careful,you will fail in the exam.為什么？除祈使句外，be動詞的否定并不是在前面加don't
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