The writer and speaker is giving a speech now.一个the主语指的是一个人,他是作家兼演讲家,所以谓语动词用单数is;
The writer and the speaker are giving a speech now.两个the主语指的是两个人,这个作家和这个演讲家,所以谓语动词用复数are;
The writer and speaker is giving a speech now.一个the主语指的是一个人,他是作家兼演讲家,所以谓语动词用单数is;
The writer and the speaker are giving a speech now.两个the主语指的是两个人,这个作家和这个演讲家,所以谓语动词用复数are;