at the speed of…以…..的速度
with great speed迅速
♣aim常用短语
take aim at瞄准
reach an aim达到目的
aim at瞄准、针对

permit与allow 的区别
表“允许做某事”或“允许某人做某事”用法基本相同。
permit/allow doing sth.
permit/allow sb. to do sth.
permit /allow of sth
一般在独立主格结构中表示“时间、条件等许可”，多用permit
Time/Weather permitting, I’ll drop in on her.
allow 还可以表示“承认”、“考虑到”。例如：
1. We allow him to be wronged.
2. will take an hour to go there, allowing for traffic delays.

♣means常用短语
by means of通过….., 靠……
by this means/ in this way用这种方法
by no means/in no case决不
by all means用一切办法

♣keep常用短语
keep up with紧跟…..
keep sb. doing sth.让某人一直做
keep sb. from doing sth.阻止…..做……
keep off the grass勿踏草地
keep to the point紧扣主题
keep in touch with与……保持联系

♣mark常用短语
make one’s mark成功、出名
be marked with标明
gain/get full marks for ……得满分

♣seat常用短语
take one’s seat坐下
have a seat请坐
see/find sb. seated看见/发现某人坐在….
be seated就座, 坐着
seat oneself in/at/on使自己坐在……

部分 动词+ to + doing 的用法
look forward to
get down to
object to
devote… to…
pay attention to
prefer…to…

♣give常用短语
give up放弃
give in让步\\屈服
give off 散发出
give away赠送、泄漏
give rise to 引起……
give out 疲劳、用完、散发出

♣fit常用短语
be fit for适合
keep fit/keep healthy保持健康
be fit to do 适合于…..
fit in with适应……
a nice fit合身的衣服
…fit sb.某人穿….. 合身

♣reach 常用短语
reach an agreement达成协议
reach for…伸手去拿/够……
within / out of reach够得到/够不着
reach sb’s understanding 使某人明白

♣feed常用短语
feed sth. to sb/feed sb. on sth. 用……喂养……
be fed up of…/ be tired of…/ be bored with…
对……感到厌倦
feed on以……为食

♣mercy常用短语
without mercy残忍地
have mercy on /upon 对……表示怜悯
at the mercy of任凭摆布
beg for mercy 乞求饶恕

♣ exist常用短语
exist in/lie in/consist in存在于……
in existence 现存的
come into existence/ come into being 形成

♣ opinion常用短语
in one’s opinion =in the opinion of sb.在某人看来
have a high/ low opinion of
对……评价高/低
give one’s opinion on
对……谈自己的看法

♣ persuade常用短语
persuade sb. to do =
persuade sb. into doing
说服某人做某事
try to persuade sb. to do
试图说服某人做某事
persuade sb. to sth.
说服某人同意某事

♣ engage 常用短语
be engaged to sb.
与某人订婚
be engaged in sth. =
be engaged doing sth.
忙于……, 从事某事

wide 与broad 的区别
它们均可以表“宽”和“广阔的”