1. 兩者都可表示過去反復(fù)發(fā)生的動(dòng)作。如：

In those days he would help her with her gardening. 那時(shí)他常來幫助她種植花木。

I used to write poetry when I was your age. 我像你那么大時(shí)常常寫詩(shī)。

I don’t swim as often as I used to. 我游泳的時(shí)候不像過去那樣多了

Children are not so well-behaved nowadays as they used to be. 孩子們現(xiàn)在沒有過去那樣聽話了。

有時(shí)兩者可互換。如：

When we were children we would (used to) to skating every winter. 我們小時(shí)候，每年冬天都支溜冰。

2. 但在下列情況中一般只用used to, 而不用would：

(1) 用來表示過去與現(xiàn)在的對(duì)比，即&ldquo 初一;以前這樣，但現(xiàn)在不這樣了”。如：

I used to go on Saturdays, but now I no longer do so. 過去我星期六經(jīng)常去但現(xiàn)在我不去了。

(2) 表示過去持續(xù)的狀態(tài)。如：

He used to like you. 我原來喜歡你。

There used to be a tree here. 原來這里有棵樹。

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