现在完成时句型转换 要20题

问题描述:

现在完成时句型转换 要20题

只有这些1. I have been to Macau before. (改为否定句)I _________ _________ been to Macau before.2. He hasn’t come to school because he was ill. (就划线部分提问) ______ _______ he come to school?3. I...