If they were allowed to choose the subjects they are keen on,they would be likely to be more motiv

If they were allowed to choose the subjects they are keen on,they would be likely to be more motiv
If they were allowed to choose the subjects they are keen on,they would be likely to be more motivated and energetic to learn these courses.
if 后面跟的是were,那么那个they are keen on,要用were吗？