There is obviously no shortcut to mastering anything and the same goes with English grammar. It takes a significant amount of time to understand as well as put English grammar to use. However there are obviously ways to improve your grammar and help you to speak correctly and efficiently. Some tips and tricks that you must be working on to improve your grammar are as follows.
1. Concentrate on tense
This should be on top of your list. This is because the tense can dictate your verb and can define the exact timeline or period of your action or anyone's action. Thus you need to mandatorily memorize all the verb forms. The truth here is that we do not always use all tenses while speaking English. Thus try interacting with good and efficient English speakers to improve your own English.
2. Common pronouns
Concentrate on pronouns. A pronoun when used incorrectly can make your entire sentence incorrect. Thus any pronoun in particular should be used in the correct place in order to be grammatically correct.
There are two types of voices and these are active and passive voice. Active voice is very simple to frame as well as speak. It has a subject as a doer of a particular action. You need to remember that whenever you change any sentence from an active to passive voice, the object and the subject will also swap.
A preposition can bring out the relationship of any object to all its surroundings. This preposition is also followed by an object of a particular sentence. It is also a rule to never end a sentence with a preposition.
5. Question tag should be opposite to the question
This means exactly what is written. The tag of your question should be opposite to the entire sense of the question. If the question is a positive one, the tag should be negative and if the question is a negative one, the tag should be positive.
The above tips should be mastered to master the English grammar. Remember these are just starters and there is a lot to spoken as well as written English. It requires tremendous amounts of practice and hard work in order to be good at it. However at the end of the day it is a simple language and a one that anyone can learn. It is one of the important things to remember.