My money came short of the necessary sum.
Do you have the necessary skills for this job?
They joined the wires and made the necessary new connection.
I'll leave it to you make the necessary arrangements.
The lawyers will draw up all the necessary papers.
No one foresees how the necessary restriction of the population will be effected.
They will meet in Beijing to debate taking necessary actions against environmental pollution.
A year's guarantee on the television set for all repairs might be necessary.
A climber must learn to discriminate as to when compass bearings are necessary and when they are not.
Under certain conditions, answering back sarcastically is necessary.
S+be+～+ prep .-phrase
Patience and understanding are necessary for a teacher of infants.
What is necessary for one person is not always necessary for another.
These reference books are necessary to scientists.
Sleep is necessary to one's health.
It is/was+～+(for sb) to- v
It was necessary to jump on the ice coated mounds of brush several times before they could flush.
It's necessary to raise wages on the basis of increasing production.
Because the company was doing more business, it was necessary to expand the factory.
It was necessary to retire several generals who lacked energy and enterprise.
It is sometimes necessary to indulge a sick child.
It is both important and necessary to note this difference.
Is it really necessary for me to attend the meeting?
It's necessary for us to net the currant bushes.
It is necessary for them to decide on which type of fuel is most suitable.
It is necessary that everyone be there in time.
It's necessary that young and old people should communicate more with each other.
We consider it necessary that the machine should be oiled regularly.
This has made it necessary for agriculture and industry to develop very quickly.
I felt it necessary to speak about our shortcomings.
Some students hold it necessary to be able to speak English.
The National People's Congress holds one session each year. When necessary, the session may be advanced or postponed.
If necessary, the heavy machinery can be brought into action.
If necessary,I'll go there again.