一般是当不可数用的。

summer:n.夏天夏季例如:Some travel companies will probably go out of business this summer. 扩展资料

We used to go sailing on the lake in summer.

从前的夏天,我们经常泛舟湖上。

I saw a lot of her last summer.

去年夏天我经常见到她。

I'd love to go to France this summer.

今年夏天我想去法国。