hasn't it
前面是主從復合句,反意問句的動詞和主語要和主句中的主謂語（這里是it's been found ）保持對應(yīng)關(guān)系.
前肯后否,所以用hasn't it
注意：it's been found =It has been found 是現(xiàn)在完成時的被動語態(tài),問句中時態(tài)要一致
很高興為您解答,fightout為您答疑解惑
如果本題有什么不明白可以追問,
it's been found that some types of oil are really bad for health------------?
it's been found that some types of oil are really bad for health------------?
請?zhí)顚懛戳x疑問句,并說明理由.
請?zhí)顚懛戳x疑問句,并說明理由.
英語人氣：536 ℃時間：2020-05-14 07:36:56
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