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。