为什么要说I am late而不说I late

为什么要说I am late而不说I late be late for sth做某事迟到啦,为什么不说be late do sth 比如 I am late to ha I am late for school I am sorry .I am late today “I am late for the party”为什么用for I'm sorry .I am late. I _____on foot.I am seldom late. I am sorry for being late.这个句子中late为什么是作副词?而不是形容词? I am sorry I am late.同义句转换为I am sorry ____ _____ late. i am sorry i am late again相同 i am sorry my late again. I am sorry for being late i am seldom late是什么词性