问： 罗教授，你好，向你请教： 由 a portion of +n. 作主语时，其主谓一致是什么情况？
答：a portion of +n. 作主语时，其谓语动词的单复数形式主要取决于a portion of 后面的名词的单复数形式。比如：A portion of money was given to his brother. (单数） / A portion of his students are very good. （复数）。如果是 portions of, 则不管后面跟的名词是单数还是复数，谓语动词都应该用复数形式。比如： Portions of this district are somewhat beautiful. （这个地区有些地方有点漂亮。）