would do 表過去習(xí)慣性的動(dòng)作,翻譯成：（過去）總是會(huì).如：
The old man would sit in front of the house,waiting for his son to come to visit him.
那位老人（過去）總是坐在屋前,等兒子來看他.
used to do 強(qiáng)調(diào)過去曾經(jīng)做過,而現(xiàn)在不做了,如：
There used to be a hospital here,but now there is a beautiful garden instead.
此地過去曾有一家醫(yī)院,但現(xiàn)在卻是被一座漂亮的花園所代替.