初三英语一句话He realized that it was a challenge and he had to fin

was not helpful at all因为前面是一般过去时,要保持时态一致。 再问： having conversations with friends 是were还是are not helpful at all 后面是动名词作主语啊 宾语从句都要保持时态一致吗 再答： 对。 首先having conversations with friends是一个整体，应该用单数。 然后She added主句是一般过去时，所以要同样保持时态一致。再问： 那主语是having，还是having conversations with friends 再答： having conversations with friends