are-is
ideas-idea
measure-measures
a去掉
many new furnitures-much new furniture
better-more
such a long
many advices-any advice
equipments-equipment
have-has
preparations-preparation
are-is
have-has
are-is
number-amount
以上的好像都涉及单复数问题。。。多熟悉熟悉可数名词与不可数名词吧。。。这样做起来容易些。改错多考语法,所以语法课时一定要认真听,买本语法书,精读一下,多做些题,熟能生巧。