You can't lift the piano alone.
ひとりではピアノは運べません
You can't make an omelet(te) without breaking eggs.
((諺))卵を割らなければオムレツはできない;犠牲は目的達成にはつきもの
You can't miss it.
((略式))(道などを教えて)すぐ目につくよ
You can't play tennis here.
ここでテニスをしてはいけない(◆軽い禁止;may notより好まれる)
You can't rely on his assistance.
彼の援助は当てにできないよ
You can't top that!
あれにはかなわない
You can't win them all.
すべてが手に入るわけではない(◆なぐさめとして)
You cannot do two things at one time!
同時に2つはできない
You cannot make a silk purse out of a sow's ear.
((諺))雌豚の耳で絹の財布は作れない;素材の悪さは変えようがない
You cheeky dog [devil]!
この生意気な!