when i was boy,the most exciting thing was when to celebrate

2个回答

  • 规则是名词作表语时一般要用冠词

    因此是I was a boy.(系表结构)

    下一个,它的先行词是 thing ,因此要用关系代词(即that,which)而不能用关系副词when,因此把when去掉或改为that.

    是last a lifetime吧?last是动词,为什么会在前面加a?

    last同样是系动词

    prep+n介词短语构成状语,名词后加不加冠词不是语法的,固定用法是怎样就是怎样了

    at an early age是固定用法

    on a bus=by bus,两种都是固定用法,而前一种用冠词,后者不用