YOU SAID:

I seriously can't think of anything to type and I have no idea why.

INTO JAPANESE

私はタイプするものについて真剣に考えることができず、なぜ私は知りません。

BACK INTO ENGLISH

I can not think seriously about what to type and I do not know why.

INTO JAPANESE

何を入力すればよいのかについて真剣に考えることはできませんし、理由もわかりません。

BACK INTO ENGLISH

I can't really think about what to enter and I don't know why.

INTO JAPANESE

何を入力すればよいのか本当に考えることはできませんし、理由もわかりません。

BACK INTO ENGLISH

I can't really think about what to enter and I don't know why.