时间不知不觉地流逝了。

Time passed unknowingly.

他不知不觉就睡着了。

He fell asleep unknowingly.

他不知不觉地学会了这首歌。

He learned the song unknowingly.

她不知不觉地吃完了一整块蛋糕。

She ate the whole cake unknowingly.

我们不知不觉就走到了山顶。

We reached the top of the mountain unknowingly.

他不知不觉地走进了错误的教室。

He unknowingly walked into the wrong classroom.

他们不知不觉地买了一幅赝品画。

They unknowingly bought a counterfeit painting.

她不知不觉地把钥匙落在了办公室。

She unknowingly left her keys at the office.

他不知不觉地在电脑上下载了病毒。

He unknowingly downloaded a virus onto his computer.

她不知不觉地用一句不经意的话冒犯了朋友。

She unknowingly offended her friend with a careless remark.