1.中文：为了准时，我们加快了步伐。
(误)So as to be in time we hurried.
(正)In order to be in time we hurried.（so as to只可放在句中，in order to可放在句首或句中。）
2.中文：你说这些话真傻。
(误)It's very foolish for you to say so.
(正)It's very foolish of you to say so.（表示评价的形容词被带逻辑主语的不定式修饰时，介词要用of。）
3.中文：你没有告诉他们永远不要做那件事吗？
(误)Didn't you ask them to never do that?
(正)Didn't you ask them never to do that?（never要放在to之前。）
4.中文：你没有告诉他们永远不要做那件事吗？
(误)Here is a new book for you to read it.
(正)Here is a new book for you to read.（作形容词用法的带逻辑主语的不定式for you to read的宾语，实际上就是它所修饰的new book，其后不可再加宾语。）
5.中文：他够年龄，可以上学了。
(误)He is old enough so that he can go to school.
(正)He is old enough to go to school.（形容词＋enough＋不定式表示足够…而可。）
6.中文：他太好了，寄给我许多书。
(误)He was so good to send me a lot of books.
(正)He was so good as to send me a lot of books.（so...as to表示如此…以致。）
7.中文：你最好不要在下雨天出去。
(误)You had better not to go out in the rain.
(正)You had better not go out in the rain.（had better(not)后接原形不定式。）
8.中文：你喜欢听别人谈话吗？
(误)Do you like listening to others to talk?
(正)Do you like listening to others talk?（感官动词或使役动词的宾语补语用原形不定式。）