Subject + 回忆 + Clause/Object
回忆 (huíyì) means "to recall," "to reminisce," or "memory" and refers to the act of thinking back on past experiences. It can function as both a verb and a noun. As a verb, it is often followed by a clause describing what is being remembered; as a noun, it refers to the memories themselves.
每次听到这首歌,我就会回忆起大学时光。
měicì tīng dào zhè shǒu gē, wǒ jiù huì huíyì qǐ dàxué shíguāng.
Every time I hear this song, I recall my university days.
老人坐在窗前,回忆着年轻时的往事。
lǎorén zuò zài chuāng qián, huíyìzhe niánqīng shí de wǎngshì.
The old man sat by the window, reminiscing about the events of his youth.
那些美好的回忆我一辈子都不会忘记。
Nàxiē měihǎo de huíyì wǒ yībèizi dōu bù huì wàngjì.
Those beautiful memories I will never forget for my whole life.