o borrow them.
析：第一个分句的时态是一般现在时，故第二个分句中的动词cost不可能是动词的过去式，且由于句子主语是it，故谓语动词应用一般现在时costs，而不能用过去式cost。
误：he as well as his parents have been to the great wall.
正：he as well as his parents has been to the great wall.
析：当作主语的名词或代词后有as well as, in addition to, including, with, along with, together with, but, except等引导的成分时，谓语动词的单复数仍由其前的主语决定。再如：my english teacher together with his family is from england.
误：not only john but also i are going to shanghai next week.
正：not only john but also i am going to shanghai next week.
析：在由not only…but also…, not just…but…, or, either…or…, neither…nor…连接主语的句子中及在there be句型中，谓语动词的单复数按就近原则处理，即按与谓语动词最靠近的那个主语来确定谓语动词的单复数形式。如：neither you nor she is a teacher.
三、单复数不一致www.gaokaomanfenzuowen.cn
名词有可数和不可数之分，而可数名词又有单数与复数之区。在英语写作中，名词单复数问题也是许多同学经常忽略的一个问题。如：
误：on the way home i took a lot of picture because since the sc