想要学好英语，在平常就要多多复习，把基础的知识点牢牢掌握，下面是我们学大教育为大家准备的2019年高考英语备考点：above, over, on用法，相信对大家的英语学习会有很好的帮助。
三个词都可以表示"在……上"，但用法不同。On表示与某物体表面接触;over表示在某物体垂直的上方，含"布满、覆盖、跨越"之意，与under 相对;above表示位置高于，但不一定垂直，与below相对。注意：与数字、数量、长度词连用时，多用over,同more than。如：over10,000people一万多人;表示年龄、刻度多用above，如a man above fifty五十开外的人;above zero零度以上。
习惯用语：well above average远在一般以上;above sea-level海拔以上;the one above上面的一个;above all首先，尤其重要的是;over there 那边;all over 遍及;over again 再一遍;over and over再三地
[应用]介词填空
①There lay an umbrella_______the table and some raincoats _____it.
②The mother held an umbrella______the boy's head so that the sun wouldn't burn him.
③ There seemed to be a war and many planes were flying____the city.
④The moon was______the trees in the east.
Key:①on,under ②over ③over ④above
above all 首先，特别是，最重要的是
after all 到底，毕竟
at all (用来加强语气)与not连用，表示"一点也不，完全不"。
in all 总共
all but 几乎，差点没(=almost,nearly)
①We have all but finished the work.
②The day turned out fine after all.
③Children need many things ,but above all they need love.
④He wasn't at all tired.
⑤Do you feel ill at all(真的，确实)?
⑥There were twenty in all at the party.