You should get your room straight.
部屋を整頓しないと
You should have been able to read the text over before the lecture.
講義の前にテキストをしっかり読んでおくことができたはずだ
You should have seen her face.
彼女の顔を見せたかったね
You should have someone check that out.
人に確認してもらうべきだ
You should never try to conceal the real you.
ほんとうのあなたを隠そうとしてはいけません
You should next take into account the color scheme.
次には配色を考慮しなくてはならない
You should really see the doctor before it's too late.
手遅れになる前に医者に見てもらうことを本気で忠告するよ
You should report on your progress in two weeks.
２週間の進捗しんちょくを報告しなさい
You should take a walk every day and, moreover, stop drinking.
毎日散歩してさらに酒もやめるべきです（◆andの強調）
You should take care not to catch cold.
風邪をひかないように
