Use a comb to straighten your hair.

用梳子使你的头发变直。

She always carries a comb in her bag.

她总是在包里带着一把梳子。

He always carries a comb in his pocket.

他总是在口袋里带着一把梳子。

He always carries a comb when he travels.

他在旅行时总是带着一把梳子。

I use a comb to style my hair every morning.

我每天早上用梳子整理头发。

She uses a comb to brush her hair every morning.

她每天早上都用梳子梳头发。

The barber picked up a comb and started cutting my hair.

理发师拿起一把梳子开始剪我的头发。

His hair needed a comb.

她的头发太需要梳理了。

I guess it must be a comb.

应该是梳子，不过不好说那是牙齿……

She swept her hair back with a comb.

她佩戴了一把小梳子作为装饰品。