※quantity 量 a large /small quantity of

large /great quantities of

（以上两词组后加可数名词复数和不可数名词都可以，谓语动词取决于quantity的形式)

　　Quantities of water are in the glass.

　　A large quantity of water is in the glass.

　　Quantities of books are on the desk.

　　A quantity of books is on the desk.

2. mean adj.吝啬的 ， 自私的，卑鄙的

be mean to sb 对某人吝啬，自私，卑鄙

It is mean of sb to do sth 某人做---真卑鄙

be mean with/over/about sth 对---很吝啬

eg. He is mean to everyone.

It is mean of you to tease her.

He is mean about money .

※means n. 手段，方法

mean vt. 意指， 意味着，意思是 meaning n. 意思，意义,含义

mean to do sth .打算 mean doing sth . 意味着

3. active adj 积极的,活跃的 actively inactively activity

be active in 在----方面很积极活跃

take an active part in 积极参加----

　eg. He is active in sports.

She used to take an active part in physical labor.

4 generous adj 慷慨的 大方的

be generous to do sth 做某事很慷慨，大方

be generous with 对----慷慨，大方

　eg. Your uncle is very generous to buy that car for you.

He is generous with his money.

5. devote vt

devote＋名 ＋to 名 奉献（人生，时间，劳力等）于--， 把---致力 于，专用于

eg.He devoted his life to promoting world peace.