for example:
1.want sb/sth（想要某人/某物)
I want that book which on the bookcase.(我想要那个在书架上的书.）
I want her.(我想要她）
2.want to do sth(想要做某事）
I want to have a picnic（我想去野餐）
3.would like to do sth（想要做某事,与want to do sth相同,但是更有礼貌）
I would like to eat lunch.(我想去吃午餐）
4.like to do sth=like doing sth(喜欢做某事）
I like to play soccer=I like piaying soccer(我喜欢踢足球）
注：want to do sth与would like to do sth中都可加人（宾格）
want sb to do sth=would like sb to do sth(想让某人做某事）
I want him to help me=I would like him to help me(我想要他来帮助我）