WRONG
The Lease does not provide for a period of time during which the Tenant is prevented to use the Premises.

RIGHT
The Lease does not provide for a period of time during which the Tenant is prevented from using the Premises.

WRONG
The crew should be provided with training on how to prevent from sea contamination.

RIGHT
The crew should be provided with training on how to prevent sea contamination.

Although the verb “prevent” takes the preposition “from”, it can also be used with no preposition. The rules are as follows:

“prevent” + something
The soldiers prevented the evacuation.
The automatic breathalyser prevents driving under the influence of alcohol.

“prevent” somebody from + -ing
The soldiers prevented the refugees from evacuating.
The automatic breathalyser prevents drivers from driving under the influence of alcohol.

The word “prohibit” works in exactly the same way:

“prohibit” + something
The law prohibits the construction of public buildings without adequate fire exits.
The school rules prohibit smoking.

“prohibit” somebody from + -ing
There are no specific provisions in the law that would prohibit an employer from summarily dismissing an employee due to his/her misconduct.

The verb “ban” also works in the same way:

The government banned the advertising of tobacco products in 2002.
The court convicted him of hooliganism and banned him from attending football matches.