六年级不必知道太多,总结一些不规则的
am is was
are were
become became
begin began
break broke
build built
fall fell
buy bought
catch caught
fly flew
forget forgot
give gave
grow grew
hold held句行结构呢六年级我记得有一个be going to do 吧，小学不太注重结构的。。主要还是靠语感。但六年级已经可以读新概念了。。虽然小学英语不是很难，但一到初中内容就多起来，所以小学最好在外面学点打基础