He didn't come because he was ill.=He didn't come because of
He didn't come because he was ill.=He didn't come because of
he didn't come yesterday because he was ill.
He didn't come to school because he was ill对because he was i
He didn't come to school yesterday (because he was ill) ).如何
He didn't come to the evening party because he was ill.【对 be
He didn't come to school because he was ill yesterday这个原因状语里
He didn't come to the prrty because he was ill yesterday原因状语
he didn't come to school,( )his mother was ill A.because B.f
He didn't come to school (because of) the illness.
it was because he was ill that he didn't come 为什么要用that而不用wh
He didn't go to school,(because he was ill).
He didn't come to school ( )he was ill