You will always find a good friend in me.
いつでも力になってあげます
You will do well to learn from this lesson.
この教訓をおぼえておくとよい
You will doubtless succeed, but you still have to be cautious.
おそらくうまくいくとは思いますが，やはり慎重を要するでしょう
You will take care of your sister.
妹の面倒を見なさい
You won't find a better house than this in a hurry.
この家よりいい家は簡単には見つからないよ
You would be well advised to do so.
そうしたほうがいいですよ
You would like to see it, perhaps?
それを見たいの，ひょっとして
You [Anyone] would think [would have thought] (that) ....
普通は…だと考えますよね（◆はずれた予想を述べる）
You wouldn't dare!
君にはとてもやれまい
You yourself are responsible for the lost book.
その本の紛失の責任はあなた自身にあります
