1 lack, vt, 直接加宾语, He lacks confidence to write in English.lack, 也有vi的时候, 这时一般是lack in+宾语, he is lacking in money.2 a lack of, 一般泛指的时候用, lack, n, 缺乏;there is a lack of... 缺乏,,,3 lack of, 一般前面都会有限定词的, 再有就是固定搭配, 前面不用a, 如lack of water.He can not buy it because of (his) lack of money. 他因缺钱买不起这个;(Habitual) lack of care. 习惯性的缺乏关心;(The) lack of rain made... 雨水的缺乏使得... 这里用the来限定了.
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