不由自主

bùyóuzìzhǔ

can't help but; involuntarily; unable to control oneself

HSK 7-9

Pronunciation

bùyóuzìzhǔ

听到这个好消息，她不由自主地笑了起来。

Tīng dào zhège hǎo xiāoxī, tā bùyóuzìzhǔ de xiào le qǐlái.

Hearing the good news, she couldn't help but burst into laughter.

One fixed sample

Full mock exams are available in HSKReady.