What effort is necessary vs Which effort is necessary

Both phrases are correct, but they are used in slightly different contexts. 'What effort is necessary' is more general and is used when asking about the overall effort required. 'Which effort is necessary' is more specific and is used when asking about a selection of efforts to choose from.

Last updated: March 24, 2024 • 836 views

This phrase is correct and commonly used in English when asking about the overall effort required.

"What effort is necessary"

This phrase is used to inquire about the general effort that is needed for a task or goal.

Examples:

What effort is necessary to complete this project?
I'm not sure what effort is necessary to achieve success in this field.

Show examples from the web [+]

So a final major effort is necessary over the next two weeks.
A very strong financial and human effort is necessary in order to achieve these objectives.
In the light of international trends, it is convinced that such an effort is necessary first and foremost in the N&N sector.
Special effort is necessary to first recognise and then fight against the human rights abuses that are rarely reported.
The Commission concludes that "an immediate effort is necessary to comply with the EU Regulation".
But I believe that this effort is necessary and that it can bear fruit quite rapidly.
In order to achieve this level of ambition, experts say that a considerable effort is necessary, but this of course depends very much on the starting point or the basic standard.
During the previous working plan this has been done (for example with the 'Nordic Swan' and the 'Stichting Milieukeur') but co-operation has not been systematic and more effort is necessary to reach a threshold level of harmonisation.
This is why it is necessary, or rather essential, to invest and concentrate all the efforts necessary to obtain a systematic response from the whole of the international community.
A huge effort is therefore necessary when it comes to HIV/AIDS, tuberculosis and malaria.
A real, consistent and effective effort of negotiation is necessary from the European Commission.
Make all the effort necessary to reach your sales goals.
These recommendations must clearly be seen as a minimum effort necessary to restore sound and sustainable fiscal positions.
The Commission is also ready to finance the mediation efforts necessary to bring about that national debate.
I believe that a concerted effort is appropriate and necessary in respect of these two important axes.
Cosmetics: From the Czech Republic more effort are necessary.
The effort necessary to analyse them completely would be disproportionate. Only alpha-, beta- and gamma-HCH are of toxicological relevance.
This is why I believe that Member States must make every effort necessary to implement the strategies intended to promote gender equality.
Going 'green' is costly, and the efforts necessary for the fundamental restructuring of many sectors in order to achieve ambitious targets are tremendous.
At the same time, the EU must make every effort necessary to reduce its energy dependency on Russia as much as possible.

Alternatives:

What kind of effort is necessary
What level of effort is necessary
What type of effort is necessary

This phrase is correct and commonly used in English when asking about a specific effort to choose from.

"Which effort is necessary"

This phrase is used to inquire about a selection of efforts and to choose the one that is needed.

Examples:

Which effort is necessary to solve this problem?
We need to determine which effort is necessary to achieve our goal.

Show examples from the web [+]

So a final major effort is necessary over the next two weeks.
A very strong financial and human effort is necessary in order to achieve these objectives.
In the light of international trends, it is convinced that such an effort is necessary first and foremost in the N&N sector.
Special effort is necessary to first recognise and then fight against the human rights abuses that are rarely reported.
The Commission concludes that "an immediate effort is necessary to comply with the EU Regulation".
But I believe that this effort is necessary and that it can bear fruit quite rapidly.
In order to achieve this level of ambition, experts say that a considerable effort is necessary, but this of course depends very much on the starting point or the basic standard.
During the previous working plan this has been done (for example with the 'Nordic Swan' and the 'Stichting Milieukeur') but co-operation has not been systematic and more effort is necessary to reach a threshold level of harmonisation.
This is why it is necessary, or rather essential, to invest and concentrate all the efforts necessary to obtain a systematic response from the whole of the international community.
A huge effort is therefore necessary when it comes to HIV/AIDS, tuberculosis and malaria.
A real, consistent and effective effort of negotiation is necessary from the European Commission.
Make all the effort necessary to reach your sales goals.
These recommendations must clearly be seen as a minimum effort necessary to restore sound and sustainable fiscal positions.
The Commission is also ready to finance the mediation efforts necessary to bring about that national debate.
I believe that a concerted effort is appropriate and necessary in respect of these two important axes.
Cosmetics: From the Czech Republic more effort are necessary.
The effort necessary to analyse them completely would be disproportionate. Only alpha-, beta- and gamma-HCH are of toxicological relevance.
This is why I believe that Member States must make every effort necessary to implement the strategies intended to promote gender equality.
Going 'green' is costly, and the efforts necessary for the fundamental restructuring of many sectors in order to achieve ambitious targets are tremendous.
At the same time, the EU must make every effort necessary to reduce its energy dependency on Russia as much as possible.

Alternatives:

Which type of effort is necessary
Which specific effort is necessary
Which particular effort is necessary

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What effort is necessary vs Which effort is necessary