I told you as a past tense by mistake but I wanted to tell you as a future tense.でいいのでしょうか。
For example. I said " I bought it. " but I actually mean I will buy it.
I used the past tense by mistake whereas I should have used the future tense.
I said it in the past tense but I meant to say it in the future tense.
1) I used the past tense by mistake whereas I should have used the future tense.
「未来形を使うべきところを間違って過去形を使っちゃったよ。」
whereas は「ところが・〜であるのに」という意味です。
2) I said it in the past tense but I meant to say it in the future tense.
「それを過去形で言っちゃったけど、本当は未来形で言うつもりだった。」
I meant to~ で「私は〜するつもりだった。」
ご参考になれば幸いです！
日本 
