Grammar Mistakes You Should Avoid
If you want to write clear, correct English, you certainly need to pay attention to the grammar rules. To help you with that, we listed common grammar mistakes you should avoid (избегать).
Mistake 1: Unnecessary would in a wish about the past
INCORRECT: Ten things I wish I would have known when I was twenty.
CORRECT: Ten things I wish I had known when I was twenty.
The opportunity for knowing the ten things existed (существовать) in the past, but exists no longer. The tense required (требуемый), therefore, is the past perfect (had + past participle).
