❶動詞の後につけて確かで, 確信して
I think it's true, but I'm not sure.
♔基本I think it's true, but I'm not sure.
私はそれは本当のことだと思うけれど確かではありません.
⦣ be動詞+sure.
I'm sure of his honesty.
I'm sure of his honesty.
私は彼の正直さを確信している.
I'm sure (that) she will succeed.
I'm sure (that) she will succeed.
私は彼女が成功すると確信している.
I think she lives on May Street, but I'm not sure about the number.
I think she lives on May Street, but I'm not sure about the number.
彼女はメイ通りに住んでいると思うが番地は確かではない.
I'm not sure if I can come tomorrow.
I'm not sure if I can come tomorrow.
あした来られるかどうか確かでない.
*会話*
Are you sure (that) you locked the door?—No, I'm not quite sure.
君は確かにドアに鍵かぎをかけたのか.—いや, あまり確かじゃない.