What are some grammar activities I can practice more often to improve my language in a short time?

Ongoing training with determination are what increases the quality of the aspirations of the

Thanks for question ....Sorry its not my field

Any Grammar practise is of a great importance to you, as all must come in unison 

To improve the language that we learn we shouldFirst, avoid talking in Arabic and try to speak the language at all times that we learn not shy awaySecondly, what we like to hear all the language that we learnThirdly Remember words phrases and pronunciation correctlyFourth leaf through online language they learned

hello well first you have to know the meaning of the verb and after you have to use ot in a sintenceafter try to to practice with other and like this u will have a good grammar

good luck

Try to listen to your self, you will know that you internally know the right grammar.

well you could practice tenses activities and how to best use it right in texts also you could try with modals exercises .by the way i advise you to know irregular verbs very well because it is the core of english grammar as we could say.sentence structures too  could be benefit to work on it as parallel structure of  some clauses.

If you are comfortable with the basic grammar, try doing active/passive conversion more and more, since that gives one a good idea of subject/object, verb agreement and tenses. In addition, practice short answers and all the modal auxiliaries. Hope that helps.  

Full Agree With Answer given by Mr. Denis Popov 

Activities that have Noun Identification are helpful. These would be count, mass, and collective nouns. Plural and possessive nouns. Activities using pronouns, verbs, adjectives are also helpful in learning a language. Knowing how to use them correctly in a sentence will improve your learning a language.

Language understanding is improved over the time; I can not tell how long, but this depends on the learning capabilities of the student and his determination to achieve the purpose. Anyhow, I can not specify some activities for quick improvement in English language! It is a complete process that should be followed with balances to measure the cons and pros.