1）remark与 observe都可以表示“说”、“评论说”,它们比say要正式：
‘You're looking very well!’She remarked／observed.
“您的气色看上去真好!”她说.
He remarked／observed that it was too hot in the room.
他说屋里太热了.
（2）notice和observe都可以表示“注意到”、“察觉到”,但有一定区别.notice 通常指无意中“察觉到”；observe 则可以指有意观察,比notice更正式：
I've noticed/ observed that he telephones her oftener than before.
我发现／注意到他现在给她打电话比以前次数多了.
She observed the picture critically for a moment.
她用挑剔的目光看了一会儿那幅画.
I didn't notice his leaving.
他走的时候我没注意到
remind
提醒;使想起,使记起
I reminded Gerald of his promise.
我提醒吉罗德他曾许下的诺言.
The story reminds me of an experience I once had.
这个故事使我想起我的一次亲身经历.