... used to + V ...
　　结构︰主词＋used to＋原形动词…
　　说明︰此句型意为"以前（常）…"。等于"<主词>＋would often＋原形<动词>"。这是一种表过去的经验的句构，对比地叙述过去与现在。而"would＋原形<动词>"也可表示过去的习惯，但"used to ..."比"would ..."规则。
　　Difficult problems used to take hours of work with pencil and paper.
　　困难的问题以前总是需要用笔和纸工作数小时。
　　There used to be a post office there. 以前在那里有一个邮局。
　　I used to (=would often) go fishing. 我以前常去钓鱼。
　　We used to hear the train whistle at night. 过去我们常会在晚上听到火车的汽笛声。
　　He would sit for hours doing nothing. 他常常什么也不做，一坐就是好几小时。
　　... would like to V ...
　　结构︰主词＋would like＋（sb.）＋to＋原形动词
　　说明︰此句型意为"想要…"。would like 是一种表示意愿的<动词>，后接<不定词> to 引导的原形<动词>。"should like to ..."虽有同样的意思，但较少用于第2，3人称。
　　Would you like to have a look at the picture? －- Yes, I should very much like to.
　　你想瞧瞧这画吗？－－是的！很想！
　　I would like to take a trip around the world toward the end of this year.
　　我想在今年底环游世界。
　　I would like you to meet Mr. Jones. 我想让你见见琼斯先生。
　　I would like him to do it. 我想要他做这事。