They fall in love with each other at the first time,They的后面要不要接be动词吗?

Because they're fall in love 有语法错误吗? fall in love again fall in love with we fall in love I fall in love fall in love i fall in love fall again fall in love fall in the love区别 Fall in love with翻译 When I Fall In Love I am fall in love fall in love 的词性 fall in love with you fall in love sb造句 I fall in love you because i fall in love be in love or fall Fall in love with someone `