YOU SAID:

I would like to know how long this will take

INTO JAPANESE

これに要する時間を知っていただきたいと思います

BACK INTO ENGLISH

I want you to know this time

INTO JAPANESE

この時間を知りたいです。

BACK INTO ENGLISH

I want to know this time.

INTO JAPANESE

私はこの時を知りたい。

BACK INTO ENGLISH

I want to know at this time.

INTO JAPANESE

私はこの時点で知りたいです。

BACK INTO ENGLISH

I want to know at this point.

INTO JAPANESE

私はこの時点で知りたい。

BACK INTO ENGLISH

I want to know at this point.