翻译成英语1、我得不到很多写作练习.2、为我们的烦恼担忧,可能会影响我们在学校的行为.顺便问一下instead of的用

I don't get much writing exercises
For our worries and concerns may influence our behavior in school.
instead of有两种词性,adv和prep
adv.
代替, 而不是...
例句：
If you cannot go, he'll go instead of you.
如果你不能去, 他愿替你去.
If there is no coal, oil can be used instead.
如果没有煤, 可以用石油来代替.
prep.（介词）
In place of; rather than:
代替；宁愿：
例句：
ordered chicken instead of fish.
点了鸡而不是鱼