be lacking in,lack词性?

be lacking in,lack词性? be lacking in 是什么词性 举例说明lack lack of 的区别有be lack of 这个词组吗? 关于短语be lacking in1.be lacking in 中的lack什么词性?2.这是表示进行时吗? lack的用法请问a lack of、be lacking in和lack for用法上有什么区别? lack相关短语的区别,be lack of,be lacking in ,lack sth,a lack of sth,等等并造句,如果还有其他相关短语,也请列出, 请问lack,lack for,be lacking for有什么区别? be lacking in life lack 的用法a lack of、be lacking in和lack for用法上有什么区别吗?尤其是lack of 和lack in 用法上的区别?最好给例句^^^ be lacking sth 和be lack in sth的区别?例：Though ______ money,the poor couple managed to send their son to college .A lacking in B lacking这里省掉了从句的主语和系动词 he was. be lacking in 和 lack for区别用法上有区别么?意思是否相同?例句说明. 英语中Lack的用法请问lack,a lack of,be lacking in这3个词有什么区别.我知道lack可以做动词和名词.a lack of是个名词词组,并且a可以省略.be lacking in是动词短语.它们3个的用法到底该怎么用.比如:1;Those lack ,lack in ,lack of有什么区别比如说Though_____money,his parents managed to send him to university.A.lacked B.lacking of C.lacking D.lacked in to lack in 怎么用啊 和 be lacking in 什么区别下面这句话用的什么句型?A person who holds a hand over his mouth when he is talking is signalling that he is lacking in confidence. lack of是什么词性?在从句中应该变成lacking 象because of后面应该加lack of还是lacking of呢? The man was set free ____evidenceA.for lack in B.for lack of C.with lack of D.lacking of 请说明理由 为什么B 不用lacking be lacking in the sense of security be lack of和be lack in区别 People (?) a general understanding of the water problem(A) are in lack (B) lack of (C) lack (D) are lacking of 选那个,急