1) Her singing quickened.

她加快了歌唱。
2) She was out of practice at singing.

她对唱歌荒疏了。
3) She sang a folk song.

她唱了一首民歌。
4) She sings.

她唱歌。
5) She is singing

她在唱歌。
6) Her pulse quickened.

她的脉搏加快了.
参考词条