211　several和some

1　several 意为“几个”，指三个以上但又为数不多，修饰复数可数名词。

She wrote him several letters but he didn't answer. 她给他写了几封信，但他没有回信。

He returned home several hours later. 数小时后他回家了。

There are several thousand kinds of birds in the world. 世界上有数千种鸟。

2　some 意为“一些，有些，若干”，所指数量不具体，可修饰复数可数名词或不可数名词。

Some birds cannot fly.有些鸟不会飞。

There are some chairs in the room. 房间里有几把椅子。

Give me some work；I have nothing to do. 给我一点工作做吧，我现在无事可做。

She put some salt in the soup. 她向汤里放了一些盐。