1) I want to buy a lipstick.

我想买一支口红。
2) I want a lipsticks.

我想买口红。
3) I'm going to buy some tomatoes.

我想买西红柿。
4) Yes. I want a crayon.

我想买支蜡笔。
5) I want to buy a pen .

我想买支钢笔。
6) I prefer an imported brand.

我想买进口的。
参考词条