Are you good at English?If your answer is "yes",please come in.我有几个问题,想请教大家：1.可不可以用30 meters every hour代替30 meters per hour2.曾经做过某事,用used写出短语3.I feel dizzy and even pain in my head中,pain

Question

Are you good at English?If your answer is "yes",please come in.
我有几个问题,想请教大家：1.可不可以用30 meters every hour代替30 meters per  hour2.曾经做过某事,用used写出短语3.I feel dizzy and even pain in my head中,pain词性是什么,意思是什么?4.用weekling造句 

Answer 1

1 30 meters every hour=30 meters per hour
A sailfish can swim 109 km per hour
It can run up to 4 metres every hour
2 used to
3 疼痛,名词
4 Is he a weakling ?