[解題] I don't know how to do?

[photoimpact7 (雷龍)]

I don't know how to do.
這句話是錯的 錯在哪裡?
那為什麼用
I don't know what to do.
就對了
我不知道要怎麼解釋給學生聽
請問各位大大
謝謝

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◆ From: 220.137.102.249
推 MANPringle:I don't know how to do. 錯在於"how"
→ MANPringle:如果要用how 應該要變成I don't know how to do it才對
→ MANPringle:how是"如何",第一句話沒有被描述的詞出現,所以錯了
→ color23:I don't know how to do (do what?) 要有受詞
→ color23:I don't know what to do.    what是do的受詞
推 cindy21:WHAT是關代  =THE THING THAT   HOW不當關代
推 alger0416:I don't know how to do it. 用how時要加it. :)