四级作文中the credit problem的problem后要不要加S

四级作文中the credit problem的problem后要不要加S problem意为问题 如果是many problem（problem后要不要加S,也就是问题可不可数 what seems to be the problem.中seems为什么要加s? No problem为什么problem不加s? -What's the problem? The maths problem is too difficult.math为什么加s 关于“The Population Problem”的英语作文 人名(单数)后的一般动词S要不要加 例句Tom like the girl like要不要加s? solve your weight problems中problem为啥加s What's the problem,Ted? have problems/trouble doing sth 中problem为什么要加s the problem is far from being settle句中为什么要加from