雅思“a portion of , a series of, a kind of, a body of, a species of, a pair of+名词”作主语时，其谓语动词一般用单数形式。【例如】A series of accidents has occurred recently in America.A pair of new glasses is quite expensive.事件、机构、国名、作品等专有名词作主语时，谓语动词用单数。【例如】The Adventures of Huckleberry Finn was written by Mark Twain and it is an interesting book.The United Nations is an organization to defend world peace.雅思
雅思如何变人称;下面有一句顺口溜“一随主。二随宾，第三人称不更新”。“一随主”是指在直接引语变间接引语时，如果从句中的主语是人称或被人称所修饰。从句中的人称要按照主句中主语的人称变化如：She said. 'My brother wants to go with me.' →She said her brother wanted to go with her.“二随宾”是指直接引语变间接引语时，若从句中的主语及宾语是第二人称。或被第二人你所修饰。从句中的人称要跟引号外的主句的宾语一致。如果引号外的主句没有宾语。也可以用人称，如：He said to Kate. 'How is your sister now?' →He asked Kate how her sister was then。“第三人称不更新”是指直接引语变间接引语时。如果从句中的主语及宾语是第三人称或被第三人称所修饰从句中的人称一般不需要变化如：Mr. Smith said: 'Jack is a good worker。'→Mr. Smith said Jack was a good worker。雅思</p 产品：澳博培训供货总量：不限产品价格：议定包装规格：不限物流说明：货运及物流交货说明：按订单
