You must be more careful to avoid mistake on this matter. vs You must be more careful to avoid mistakes on this matter.

The second phrase, 'you must be more careful to avoid mistakes on this matter,' is correct. The plural form 'mistakes' is needed to match the plural noun 'mistakes.' The first phrase is incorrect because it uses the singular form 'mistake,' which does not agree with the plural noun 'mistakes.'

Last updated: March 29, 2024 • 1994 views

You must be more careful to avoid mistake on this matter.

This phrase is incorrect. It uses the singular form 'mistake' when the plural form 'mistakes' is needed to match the plural noun 'mistakes.'

The singular form 'mistake' should be changed to the plural form 'mistakes' to match the noun 'mistakes.'

Show examples from the web [+]

But, Scarlett, you must be more careful.
You must be more careful from now on.
You must be more careful now and look after it well, since you have seen that your card is obviously especially valuable.
You must be more careful with your toys, Mister Vandermar.
You must be more careful when I dictate!
Tell Katie Scarlett she must be more careful.
I know, but we must be more careful.
Tell Katie Scarlett she must be more careful.
We must be more careful with the principle of legality where this matter is concerned.
Tell Katie Scarlett she must be more careful.
You really must be more careful.
We must be more careful over price reductions and continue our interventions regarding beef and olive oil, notwithstanding the Commission's proposals.
I always say she must be more careful but never listens to me.
Additional tasks are transferred and the whole thing is rubber-stamped by the Council, which then comes to us and tells us that we must be more careful with money!
Better be more careful next time.
You should be more careful, with such a jealous man.
Your mother should be more careful.
Tell your mother to be more careful.
You should be more careful, sweetheart, throwing your money around like that.
You should be more careful who you employ.

You must be more careful to avoid mistakes on this matter.

This phrase is correct. It uses the plural form 'mistakes' to match the plural noun 'mistakes.'

Use the plural form 'mistakes' to match the plural noun 'mistakes.'

Show examples from the web [+]

But, Scarlett, you must be more careful.
You must be more careful from now on.
You must be more careful now and look after it well, since you have seen that your card is obviously especially valuable.
You must be more careful with your toys, Mister Vandermar.
You must be more careful when I dictate!
Tell Katie Scarlett she must be more careful.
I know, but we must be more careful.
Tell Katie Scarlett she must be more careful.
We must be more careful with the principle of legality where this matter is concerned.
Tell Katie Scarlett she must be more careful.
You really must be more careful.
We must be more careful over price reductions and continue our interventions regarding beef and olive oil, notwithstanding the Commission's proposals.
I always say she must be more careful but never listens to me.
Additional tasks are transferred and the whole thing is rubber-stamped by the Council, which then comes to us and tells us that we must be more careful with money!
Better be more careful next time.
You should be more careful, with such a jealous man.
Your mother should be more careful.
Tell your mother to be more careful.
You should be more careful, sweetheart, throwing your money around like that.
You should be more careful who you employ.

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You must be more careful to avoid mistake on this matter. vs You must be more careful to avoid mistakes on this matter.