[b]主谓一致[/b][b][b]1. 在名词+of+名词这种结构中, 前一个名词是整个短语的中心词, 当该短语作主语时，一般以of之前名词的数为依据确定谓语的数.[b]one of 之后需接复数名词，但one of+名词作主语时中心词是one，故谓语应用单数[b][b][b]2. 由and连接的多个名词作主语，谓语动词应用复数[b]但是如果用and连接起来表示单一的概念时，谓语动词要用单数[b]The famous singer and actress, Whitney Huston is coming to the ceremony.[b](在这里, singer和actress指得是同一人, 都是Whitney Huston)[b][b]3. 不可数名词，尤其是抽象名词(relation, authority, necessity, power, democracy, young等)作主语时要视为单数，谓语自然也要用单数[b]The relation between us is very simple.[b][b]4. 单个从句作主语时，谓语用单数[b]That she has gone insane is sheer rumor.[b]When they will come hasn't been made public.[b][b]5. 如果主语是单数，那么即使后面有with/ together with/ along with/accompanied by, no less than, like, but,except, including, besides等引导的短语，谓语动词仍然要是用单数[b][b]6. 由Not A but B, Not only A but also B, either A or B, neither A nor B引导的主语，谓语通常和最邻近的主语相一致[b]Either you or Mary hurts her.[b][b]7.在there be句型、介词短语、副词为句首引起的倒装句中，真正的主语通常在谓语的后面，谓语应该和后面的主语在数方面相一致。[b]但是在there be 句型中，如果有两个或者两个以上的主语，必须和最接近他的那个主语相一致。[b]There is only one pencil, two books and one cup on the table.[b]Many a time has he given us good advice.[b][b][b][b]主从句时态一致[b][/b][b]1．通常当主句中的时态是现在时或将来时态时，从句中的动词时态并不受影响，往往还是根据从句的意思而定。[b]I know that he will come tomorrow.[b]I know that he has finished reading this book.[b]I know that he went to school yesterday.[b][b]2. 当主句中的时态是过去时态,那么从句中的时态要作一定的变化[b]I knew that he would come tomorrow. (现在将来时变为了过去完成时)[b]I knew that he had finished reading this book. (现在完成时过去完成时)[b]I was told that he was free today. (现在时态变为过去时态)