为什么If you sit in front,you will see clearly.可以转换成 Sit in front,and you will see clearly.

Sit in front,and you will see clearly.为英语中的一个固定句型,即祈使句,and/or+陈述句
如果用and就表示顺联,意为如果.就会.
如果用or就表示转连,意为.,否则的话
比如：hurry up,or you will be late.
study hard,and you will make progress........说的听不懂