I don't know what you need exactly but just in case I send you the most important grammar rules of English
1- Adverbs vs adjectives
Be sure to use adjectives and adverbs correctly. Adjectives are used to describe, identify and quantify people or things; and adverbs modify verbs, adjectives and other adverbs.
For example
That is a cute puppy → That is a cute puppy (adjective)
He speaks slowly → He speaks slowly (adverb)
2- Check the homophones
Homophones are those words that sound the same, but are written differently and have different meanings. They are a nightmare when writing in English, since the proofreader does not detect them as poorly written, and many times they are lost before our eyes. Therefore, it is recommended to make a thorough review after writing a text in order to eliminate these errors.
Examples:
They’re / their / there
Complement / compliment
3- Use the correct conjugation of the verb according to the subject
You should always take the subject of the sentence into account when using English verbs, since talking about singular subjects (he / she / it) is not the same as talking about plural subjects (they / we).
For example in present simple:
Correct → She has two cats
Incorrect → She have two cats
4- Match your ideas with conjunctions
If you want to relate two ideas with a second combination of subject, verb and complement, you must do so with the coordinating conjunctions.
For example
I don’t walk Mary’s dog, nor do I wash him → I don’t take Mary’s dog for a walk, nor do I bathe him
Mary fed her dog, and I drank tea → Mary fed the dog, and I drank tea.
5- Use a “consecutive comma” in a list
The consecutive comma is the last comma in a list, usually appears before "and". Let's see some examples:
Pets R Us has lizards, dogs, and birds → Pets R Us has lizards, dogs and birds
In this example we can see that the consecutive comma is after "dogs".
Pets R Us has lizards and frogs, dogs and cats, and parakeets and macaws
In this sentence the consecutive comma comes before "and", but not the last of the sentence. The last "and" is there just to make the prayer sound better, pairs of animals are being listed.
6- Use the “semicolon” to join two ideas
If you want to join two ideas, but you don't know how or you can't put a coordinating conjunction, you can use the “semicolon”
For example: Mary’s dog is hyperactive; it won’t stop barking → Mary’s dog is hyperactive; It doesn't stop barking.
7- Use verb tenses correctly
If you are going to talk about daily actions, use the present simple.
For example: I don’t walk Mary’s dog → I don’t walk Mary’s dog
Mary and I drink tea every Tuesday → Mary and I drink tea every Tuesday
Use the present progressive or continuous to talk about actions that are happening in the moment. These sentences are easy to perform, because the verb always ends "-ing."
For example: Mary is playing with her hyperactive dog → Mary is playing with her hyperactive dog
The barking dogs outside are driving me crazy → The dogs that are barking outside are driving me crazy
Use the present perfect to talk about past actions that have not culminated. Remember to use the verb "have" as an auxiliary with your conjugation in the present.
For example:
I have drunk three cups of tea today → I've had three cups of tea today
Mary’s hyperactive dog has bitten me three times so far → Mary's hyperactive dog has bitten me three times so far
The perfect past is used when we want to talk about two actions that happened in the past and want to highlight which one happened first. The action that happened first is the one that will change to past perfect and gets the auxiliary verb "had".
For example: I had not yet eaten breakfast when Mary walked her dog → I had not had breakfast yet when Mary walked her dog
By the time I drank one cup of tea, Mary’s dog had barked a million times → By the time I had a cup of tea, Mary’s dog had barked a million times
8- Add “-ed” to past verbs
When we speak in the past, we must add “-ed” to regular verbs. But we must be careful with irregular verbs, because they conjugate differently.
For example: Mary walked her dog this morning → Mary walked her dog this morning.
I drank three cups of tea yesterday → Yesterday I had three cups of tea.
