1、use可以作動(dòng)詞和名詞
(1) 作動(dòng)詞時(shí)，“使用，利用，服用（毒品）”
過(guò)去式used，過(guò)去分詞used，現(xiàn)在分詞using.
(2) 作名詞時(shí)，“使用，使用權(quán)，功能”
形容詞useful , 副詞usefully
2、關(guān)于use 的三個(gè)固定句型：
(1) used to do sth. "過(guò)去常常做某事"
(2) be used to do sth. "被用來(lái)做某事"
(3) be used to doing sth "習(xí)慣做某事"
3、辨析：
(1)used to do sth. "過(guò)去常常做某事"
to 后加動(dòng)詞原形,否定句為didn't use to或used not to
eg: I used to take a walk after supper every night.
(我過(guò)去常常在每天晚上飯后去散步)
(2) be used to do sth. "被用來(lái)做某事"
to 后加動(dòng)詞原形
eg: Wood is used to make paper.
(木材被用來(lái)造紙)
(3) be used to doing sth "習(xí)慣做某事"
to是介詞，后加名詞，動(dòng)名詞或代詞
eg: He is used to getting up early.
(他習(xí)慣早起)