(25) a ticket for ...for 作介词表示原因，
另外for 当“给......，适合......”讲表示对象和用途 eg；This is the ticket for you. These books are for children.
(26) 区分stop to do sth.及stop doing sth.
stop to do sth （停下来去做另一件事） stop doing sth. （停止正在做的事）
eg；Let’s stop to have a rest. Please stop talking.
(27) care“照顾，照看”作名词构成短语: take care of （照顾好...）
作动词构成短语: care for 意思同 look after（看护...） eg；I’ll take care of your cats when you are way.
She cares for her sister when she was a baby. 扩充：careful 反义词为careless
(28) 祈使句表示命令、请求，建议，警告，一般省略主语you，以动词原形开头。 1)以系动词be开头的祈使句如Be quiet!
2)以实义动词原形的祈使句开头Put your things away!
3)以let开头的祈使句Let’s go to the school!
4)以系动词be开头的祈使句或以实义动词原形的祈使句
其否定式是在句首加don’t. eg:Don’t be late!
5)以let开头的祈使句有两种否定形式“Let+宾语+not+动词原形”
“Don’t let+宾语+动词原形+其他 ” eg: Don’t let him do that. = Let him not do that.
6) 公共场合的提示语常用“No +n./v-ing”来表示“禁止做某事” eg: No camera! 禁止拍照 No smoking! 禁止吸烟
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