Though he is clever,_____ he doesn't work hard.yet可以填吗?

问题描述:

Though he is clever,_____ he doesn't work hard.yet可以填吗?
yet做副词讲有但是的意思,这里可不可以把它看作动词呢?

不可用yet的,因为yet一般用于完成时态!最好是什么也不填!