1-It is not permitted to smoke in the office.[✔️]
2-You are not allowed to smoke in the office. [✔️]
3-It is not allowed to smoke in the office.[❌]

►The passive structure with ( it ) is only possible with 'permit'.

►We use adverbs such as "almost", "nearly" and "practically" with "every", but not with "each":

-Salman has read almost every book he had.[✔️]
-Salman has read almost each book he had.[❌]

“Recur” = happen repeatedly and regularly.

“Reoccur” = happen again.

The sunrise *recurs*.

Ensure that financial crises do not *reoccur*!

DIGEST = to break down food; to understand. 💭

DIVEST = take away possessions; reduce:
The thief was DIVESTED of the money 💰 he had stolen.

The Three Proper Usage:

➖I'm leaving tomorrow; however, I'll be back on Friday.
(Between two independent clauses)
➖I'm leaving tomorrow. However, I'll be back on Friday.
(Starting a sentence)
➖I will be back on Friday, however, to collect my things.
(Breaking the flow in a sentence)

NOTE:

'However' is also means "whatever way or manner"