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Used with verbs:
"
Getting involved has become necessary."
(has become, be: is/am/are)
"
He doesn't feel it is necessary."
(feel)
"
We found it necessary to go."
(found, considered, thought)
"
This doesn't seem necessary."
(seem, appear)
Used with nouns:
"
I am missing some necessary information."
(information, data, paperwork, papers, parts)
"
We don't have the necessary ingredients."
(ingredients, equipment, tools)
"
He doesn't have the necessary training."
(training, skills, qualifications)
"
We took the necessary actions."
(actions, steps, measures, procedures, precautions)
"
Do you have the necessary permit?"
(permit, document, expertise)
"
There are a few necessary preparations."
(preparations, repairs, requirements)
"
I made some necessary improvements."
(improvements, adjustments)
Used with adverbs:
"
This action is hardly necessary."
(hardly, really, absolutely, strictly)
"
The operation is medically necessary."
(medically)
Used with prepositions:
"
I will call you when necessary."
(when, if, as)
"
Just vacuum where necessary."
(where, when, if)
"
Air is necessary for survival."
(for)
