"errors in grammar" is a correct and commonly used phrase in written English.
It is typically used to refer to mistakes or incorrect usage of grammar rules in a sentence or written piece. Example: The essay was well-written, but it contained several errors in grammar which lowered its overall quality.
This article was amended on 24 January 2014 to correct several errors in grammar and spelling.
She lay awake many nights reappraising job-interview performances: errors in grammar, scandalous open-toed shoes.
The first accused it of being "riddled with errors in grammar, spelling and punctuation".
Even after her 100th birthday, with her commanding interest in the English language, she continued to correct the errors in grammar of family and friends.
If there are errors in grammar or in other areas, I prefer to just write them down correctly without an explicit correction.
Most of the others contained errors in grammar, syntax or spelling, or otherwise revealed that the reviewer was far from fully familiar with the context in which the book should be judged.
3 58 p.m. | Updated I fixed an unfortunate error in grammar pointed out in the comments below.
The College Board thought the sentence was correct, but a journalism teacher in Maryland told the officials that the word "her" did not refer back to Toni Morrison but to "Toni Morrison's" -- an error in grammar.
If you answered "yes" to any of these questions, you need to know about a very common error in grammar that so many of us make when we are talking with others--a very simple error that is easy to correct.
Carefully run through the test to make sure there are no errors in spelling, grammar or syntax.
If you do not have a natural eye for errors in spelling, grammar, punctuation, and logical flow, you may want to ask someone else to do the copyediting.
