Affirmative: They will/would have arrived home by now.
Negative: They won't/wouldn't have arrived home by now.

Affirmative: He will/would have reached New York.
Negative: He won't/wouldn't have reached New York.

I was trying to change the affirmative sentences into negative ones. Could you please check them out for me and see if they are right? Thank you very much!
Regular Member546
They seem fine to me. "wouldn't have arrived home yet" is also very common.
Veteran Member20,915
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Anonymous:
change into negative and introgative

she`has rubbed the board

you must have locked the doors
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Anonymouschange into negative and introgative
she`has rubbed the board
you must have locked the doors
simultaneously?

Hasn't she rubbed the board?

Could you have not locked the doors?
Proficient Speaker: Users in this role are known to maintain an excellent grasp of the English language. You can only be promoted to this role by the Englishforums team.Retired Moderator: A moderator who has retired.Trusted Users: Trusted users are allowed to use additional capabilities of the site such as private messaging to all users and various other advanced features. You cannot join this role unless you are promoted by an administrator.