Errors with sentence structure:
Errors with past tense verbs:
Errors with articles (a, an, the) you can do a quiz here:
https://www.ieltsanswers.com/IELTS-Grammar.html
The is used to refer to one specific thing like the government, the Internet, the best way to learn
Don’t use a/an with uncountable nouns
Errors with punctuation.
Passive form needed [“be” + past participle]
Errors with subject verb agreement.
Avoid unnecessarily complicated sentences.
Try to write a wider variety of sentence types.