Hi 

inspite of knowing grammar, I am not able to speak. I find difficulty while speaking. How can I get rid of this problem? 

English has about 75 to 100 verbs of daily use. Write down 100 of these and construct a sentence with each of them in all the tenses- simple present, present continuous, present perfect, simple past, past continuous, past perfect, future simple, future continuous, and future perfect.

Incorporate it into an able and carry it around you, reading it as many times as you can during the day. Within ten days, you will be speaking English fluently.

Hello,

I have met many people throughout my short experience, who are good with grammar. Still, they can't use it in day to day life while communicating in English. So, my advice to you is to focus on all the four ways of learning a language, i.e., to read, write, listen and speak the language as much as you can, instead of just mugging up grammar formulas.

Grammar has nothing to do with how you speak. Yes, grammar is essential, but not necessary for the communication process. You need to record and listen to your audio(s) daily, try to listen to English songs, learn and recite as much as you can. Most importantly, don't be afraid to speak in English. Keep practising.

Hi Ashraf,
# Knowing grammar is a different thing and using that knowledge in your conversation while you speak with people is an altogether different thing.
# You should learn grammar with a practical or conversational approach.
# You should use the particular grammar concept in your conversation.
# For example, if you know the Simple Present Tense, then Simple Present Tense id used to talk about daily routine and habits. So it would help if you used a simple present to talk about your habits.
# Practsing English is in regular conversation is the key to fluency.
Thank you!

The human cognitive behaviour is based on repetitions. It would help if you started speaking in English, listen to more English Commentaries, be it in any football or cricket match, it helps. 

Try and put your grammar skills to use. 

Even though grammar has no role to play in learning a language, you as a kid of class Nursery must have spoken correct 'Hindi' without having much grammatical wisdom. 

English is just like any other language. Treat it parallel to other languages you have already learnt. Anyway, I hope things get easier for you. Don't give up Ashraf!