stop…from doing sth. 其主语为“人”，宾语为“金钱”或“时间”；后面可搭配介词“on + 名词/代词”，或“in(可以省略) + 动名词”。使用句式为：sb. + money/time + on sth./(in)doing sth.①They spent 2000 yuan on the TV set./They spent 2000 yuan(in)buying the TV set.他们花了 2000 元这台买电视机。②The writer spent 2 years(in) writing the novel./on the novel.这位作家花了两年时间写这部小说。另外：“花钱”还常用以下两个句式：sb.+ pay money + for sth./sth.+cost sb.+money①They paid 2000 yuan for the TV set.②The TV set cost them 2000 yuan.“花时间”还常用 It takes sb. some time to do sth. 句式。It took the writer 2 years to write the novel.2、still1) 用作形容词，意为“静止的，不动的，平静的”。如：keep(stay) still 保持不动；lie(stand)still 躺着（站着）不动；a still lake/evening 平静的湖/寂静的夜晚。2)用作副词，表示“还，仍旧”，可以修饰形容词、副词比较组。如：be still busy 仍然很忙；win still greater success 取得更大成功。3)辨析 still,quiet,silent。still 侧重“一动不动”，quiet 指“安静”，无动作，无声音，无骚乱，其反义词是 noisy（吵闹的、喧哗的）；silent 指不出声，不说话。对比：sit still 坐着不动。Be quiet,and the class will begin. 请安静，马上就要开始上课了。Hearing the answer,be was silent for a minute or more. 听了回答之后，他沉默了一两分钟。完成句子他个子高，他哥哥更高。He is tall,but his brother is _________ _________.② 我已经考虑了几个小时，但仍然不能决定。I have been thinking for hours, but I ______can’t decide.Key:①still, talker ②still3、stop…from doing sth. 阻止……做某事stop 也可换为 prevent 或 keep.①Nothing can stop/prevent/keep us from doing that. 没有什么能阻止我们那样做②This is the best way to stop/prevent/keep such a thing from happening again.防止这样的事再次发生这是最好的办法。当该句型用到动词 stop 或 prevent 时，后面的 from 可以省略。I tried to stop/prevent him(from)smoking, but I failed. 我试图 劝他戒烟，但没成功。但当用到动词 keep 时，from 不能省略。因为省略后得到的是另一句型 keep…doing sth.意为“使……不断地做某事”。I’m sorry I’ve kept you waiting for so long. 很抱歉让你久等了。
