一用作名词时基本意思是“缺乏,不足”,不可数,只用作单数形式,其前面加不定冠词a,常与介词of连用。
a lack of money. 缺乏金钱。
Hard work can often make up for a lack of ability.
Their failure to reply to our letter seems to imply a lack of interest.
他们没有回我们的`信,似乎暗示他们缺乏兴趣。
He can’t endure the lack of food. 没有食物，他再也坚持不下去了。
二.用作及物动词表示“缺乏;不足;没有”
To be entirely without or have very little of.缺乏：根本就没有或仅有一点
To be in need of.需要
She lacks patience in dealing with children. 与孩子打交道她缺少耐心。
三.用于不及物动词还可作“缺乏，短少;不足;需要。常用进行时
be wanting or deficient:缺乏：处于匮乏或不足状态：
You will not be lacking in support from me.你将得到我的帮助
be in need of something:需要：需要某物：
I lacked for nothing.我不需要任何东西
They lacked for nothing.他们无所需求(应有尽有)。
