The phrase "certainly necessary to" is correct and usable in written English.
You can use it when you want to emphasize that something is very important or essential. For example, "It is certainly necessary to ensure that everyone is following the safety protocols."
But it's certainly necessary to be both patient and realistic in one's expectations.
International economic pressure is certainly necessary to contain Iran's nuclear ambitions, as "Iran and the Strait" (editorial, Dec. 30) argues.
On paper, the Giants' 12-point victory was seemingly convincing, and certainly necessary to keep pace with the rest of the N.F.C.
The youthful ensembles also frequently have more time to rehearse than most professional orchestras, which is certainly necessary to play Mozart well.
It's certainly necessary to have a clearout of City bosses, prosecutions and wide-ranging inquiries, but only far-reaching change will clear this cesspit.
He stated during a party meeting in February that "Crimea chose Russia — we cannot reproach them for that," and added, "It is certainly necessary to find the means to intervene to protect the Russophones in Ukraine so long as the situation there has not calmed down".
While it's certainly necessary not to keep all the artwork that children create, it shouldn't be the parent who makes the decision about what to discard ("Mom, You're One Tough Art Critic," Jan . 27.
It certainly is necessary to protect them from fanatics, but not from fans.
It would almost certainly be necessary to keep the animals in captivity, so it would be essential to provide as interesting an environment as possible.
However, even though it can be interesting to draw comparisons between books by the same author, it is certainly not necessary to read everything an author has ever written in order to make comments about a particular book.
