become serious about可以看做一个复合谓语么

However ,after a year so in which they became more serious about their work, the Monkees started to play and sing their own songs like a real band.

定从的句子结构可以看成主谓宾么? 把 became serious about 看做谓语。

They became more serious为主语+系动词+表语结构啊！！！

become为变化系动词

However ,after a year so in which they became more serious about their work, the Monkees started to play and sing their own songs like a real band.

然而，在一年后，他们变得愈加认真的工作，猴子开始演奏和唱我们的歌曲，就像一个真的的乐队。