lack sth.(wisdom／common sense／money缺乏智慧／常识/金钱)

be lacking in (courage／determination to do...) 缺乏做某事的勇气／决心

a／the lack of... ......的缺乏

for lack of 因缺乏......

have no lack of 不缺乏

[典例]

1) You will not be lacking in support from me. 你将得到我的帮助

2) I lacked for nothing. 我不需要任何东西

[练习]用lack的适当形式填空。

1)Though _________(1ack)money，his parents managed to send him to university．

2)He completely _______ conscience．

3)She is ________ in responsibility.

4) ______ of rest makes her look tired.

Keys: 1)lacking 2)lacked 3) lacking 4)Lack

2) require v.需要；要求；命令

[重点用法]

require+ n./ pron. /doing sth./ to do sth．/that-clause

[典例]

1) This suggestion will require careful thought. 这建议需要仔细考虑。

2) To carry out this plan would require increasing our staff by 50％．

执行这-计划需要增加50％的人员。

[练习]用括号里所给词的适当形式填空。

1)His health requires that he _____(go)to bed early．

2)The floor requires _______ (wash)．

Keys: 1) (should) go 2)washing

3) assist vt.／vi．帮助；援助订．参与，出席

[重点用法]

assist sb． in/with sth．辅助(某人)某事

assist sb．in doing sth． 辅助(某人)做某事

assist sb．to do sth． 辅助(某人)做某事

assist with 帮助(照料，做)；在......上给予帮助

[典例]

1)I am willing to assist you whenever there is an opportunity．

有机会我愿随时帮你。

2)I'm afraid I can't assist you，you have to go and see the manager．

我恐怕帮不上忙，你得去找经理。

3)The headmaster assists with a lot of things when free．

有空时校长帮忙做了很多事。

4)You will be required to assist Mrs．Smith in preparing a report．

你将要帮助史密斯夫人准备一份报告。

[练习] 根据句子的意思在括号里填入适当的词。

1)The young nurse was very nervous when she ________ in her first operation．