比如中文:他去上学”,英文不存在“He go to school.”这种没有时态的句子。要么是He goes to school表示一般现在时,要么是过去式He went to school或者其他时态。一个句子当中,He had to go to school. 其中had是动词有时态(一般过去时),是谓语动词,to go有动词没有时态,是非谓语动词。虽然有两个动词,但是只有一个是真正的谓语。
初一初二阶段,我们基本在学名词单复数啊,动词的基本时态现在、过去、将来呀,然后宾语从句等。
初三或以上,特别是高中时期,老师更多是在讲句法(动词+主被动语态+16种时态),特别是各种复杂的复合句,以及非谓语动词。比如,把定语从句变为定语成分(谓语动词变为了非谓语动词作定语)。
举个例子,初三的定语从句:
The ship that traveled thousands of miles from Japan to New Zealand has broken down since its first voyage.
高中就升级成非谓语作定语:
The ship traveling thousands of miles from Japan to New Zealand has broken down since its first voyage.