为你解答.
（1）Keep（改为：Keeping,动名词） health is very important.
（2）Eat（改为：Eating） vegetables is good for our healthy.
（3）We are（去掉are） both like study.
（4）You can spent（改为：spend,原形） time with your friends.
（5）First, we must to（去掉to） have a healthy eating habits.
（6）Start （加上to,不定式） exercise before it's too late.
（7）We （加上are） both hardworking.
（8）I'm （加上more,比较级） outgoing than she.
（9）The best way to relax is （加上to,不定式） do exersice.
（10）The most important thing is （加上to,不定式）keep healthy.
（11）You have to exercise everyday（改为：every day,每天）.
（12）It's very important for everybody to keeps（改为：keep,原形） mind and body health.
（13）We also have differents（改为：differeces,差异,名词复数）.