如题所述
介词to 后面接名词性质的词,所以包括 名词、动词ing等,如:
I am used to doing a lot of housework. (我习惯于做很多家务)
注:be used to doing sth 习惯于做某事
动词不定式符号to 后面加动词原形,如:
I used to do a lot of housework. (我过去经常做很多家务)
注:used to do sth 过去经常做某事