这effort为什么加S?Your efforts make our studying abroad possible.为什么加S?

这effort为什么加S?Your efforts make our studying abroad possible.为什么加S? effort什么时候加s make efforts to do sth.为什么effort要加s? effort 什么时候加 s 什么时候不加? spare no effort effort要加s吗 make efforts to do sth.为什么effort要加s,它是可数名词吗? It`s worth your time and effort.怎么翻译 It's worth the time and effort we devoted to it.为什么最后还要加一个it People in that area are making efforts to turn the desert into rich land请问为什么effort加S What's your name?中的your为什么要加R? What's your favourite animal?为什么不加s? what's your favourite animal?为什么animal不加s If you don't make an effort now这句话中为什么加make?我是英语白痴~ effort 什么时候加 s 什么时候不加?只单独针对 努力这么一个意思进行解释. raise your hand为什么hand不加s now comes your turn 为什么要加s Now comes your turn(come为什么加S）? who were your first friends?friend 后为什么加s