certainly

確かに、間違いなく

何かが本当である、または必ず起こると確信していることを示す。

やさしい英語で： Used to say that you are sure something is true or will happen.

• It is certainly cold today.
• You will certainly need a coat.
• That was certainly the best meal we had.

類義語： definitely, surely, undoubtedly

よく使う表現： certainly true, will certainly help, certainly not

もちろん、承知しました

丁寧に「はい」と答えたり、頼まれたことを引き受けたりするときに使う。

やさしい英語で： A polite way to say yes or agree to do something.

• “Can I sit here?” “Certainly.”
• “Could you help me?” “Certainly, give me a moment.”
• “May we leave early?” “Certainly, you have finished your work.”

類義語： of course, yes

反対語： no

よく使う表現： certainly you may, certainly sir, certainly why not

確実に

確かな知識に基づき、疑いを残さないようなやり方で。

やさしい英語で： In a way that shows firm knowledge or leaves no doubt.

• We cannot know certainly what happened.
• The cause could not be established certainly.
• Can anyone determine certainly which account is accurate?

類義語： with certainty, conclusively

反対語： uncertainly

よく使う表現： know certainly, establish certainly, determine certainly