if necessary
fixed phr.. A2 Elementary Oxford
fixed phr.. This means something will be done only if it is needed or required.
fixed phr.. A conditional clause indicating that an action will be taken only when required by circumstances.
If necessary, please call me.
We can add more chairs to the room if necessary, but I think we have enough.
The team was prepared to work through the night and, if necessary, cancel their weekend plans to meet the project's non-negotiable deadline.
Usage
This phrase can be placed at the beginning, middle, or end of a sentence.
Teaching tip
Explain that this is a reduced conditional clause, short for 'if it is necessary'.
Pitfall
If necessarily, we will change the plan.If necessary, we will change the plan.The phrase uses the adjective 'necessary', not the adverb 'necessarily'.