We must do all we can make our world better.多词、缺词或错词
热心网友
We must do all we can (to) make our world better.少了一个toWe must do all to make our world better.we can作all的定语，是一个定语从句
热心网友
can(to)make
热心网友
we must do all we can (to) make our world better这里不定式是表目的的。实际上在can 的后面省去了do , 补充完整了就可以看出来了。We must do all （we can do)to make our world better
热心网友
we must do all we can (to) make our world better.to make our world better表目的