Will you answer the phone?It could be your mother.

问题描述:

Will you answer the phone?It could be your mother.
怎么分析这个句子的成分?
特别是could be
情态动词后面+be是什么意思?
He must be over sixty now.
也是情态动词+be

1.这句话的意思是你要接电话吗,可能是你的母亲.前面是一般疑问句.后面一句it 做的是形式主语.
2,.像must,may,can 等等这些像你说的都是情态动词,后面加动词原形,be动词的原形就是be所以是could be ,must be