他做错事后，连忙道歉。

Tā zuò cuò shì hòu, liánmáng dàoqiàn.

After he did something wrong, he quickly apologized.

她看到蟑螂就连忙逃跑。

Tā kàndào zhāngláng jiù liánmáng táopǎo.

As soon as she saw the cockroach, she hurriedly ran away.

她发现自己说错话了，连忙改口。

Tā fāxiàn zìjǐ shuō cuò huà le, liánmáng gǎikǒu.

She realized she’d said the wrong thing and quickly corrected herself.