YOU SAID:

I'm going to have to go home and have a stiff drink

INTO JAPANESE

家に帰って硬い飲み物を飲まなければならない

BACK INTO ENGLISH

I have to go home and drink a hard drink

INTO JAPANESE

家に帰ってハードドリンクを飲む必要があります

BACK INTO ENGLISH

I need to go home and have a hard drink

INTO JAPANESE

家に帰ってハードドリンクを飲む必要がある

BACK INTO ENGLISH

I need to go home and have a hard drink