English grammar – Double negatives
“There is nothing I can’t do.”
This is a common phrase that uses 2 negative words in a sentence.
Double negatives are still widely used in English where they don’t seem to cause any confusion as to the intended meaning. Nevertheless, they aren’t considered acceptable in current standard English and you should avoid them in all but very informal situations. Just use a single negative instead.
So the sentence “There is nothing I can’t do.” is not correct grammar, but it is acceptable in less formal situations because the meaning is clear. ✔
Let’s look at how we express ourselves in more detail and we’ll look closely at negatives.
There are 3 basic ways to communicate, affirmative (positive), negative and interrogative (question).
You can see affirmatives and negatives are direct opposites. We can use the adverb not (or the contraction n’t) to show a negative or we can use a negative word like never, nowhere, no-one etc. Words with a negative prefix like un, in, dis or non also have a negative meaning. Examples:
“Kyle doesn’t know nothing about computers.”
The speaker is using 2 negative words to strongly show that Kyle doesn’t know computers well. Here the 2 negatives cancel each other, so this grammar is incorrect. We don’t use this sentence in natural English.
“Kyle doesn’t know anything about computers.”
“Kyle knows nothing about computers.”
Increase your English vocabulary! Learn 40 Words with NEGATIVE prefixes
“The puppy in the window was so cute! I couldn’t not buy him!”
“You ain’t seen nothing yet.”
“I don’t regret not going to the party.”