To become a fluent English speaker, you must study and master reading, listening, and speaking.
Some methods :-
1.Don't study grammar too much- Studying grammar will slow you down and confuse you. You will think about the rules when creating sentences instead of naturally saying a sentence like a native.
2.Learn and study phrases and collocation- These are essential part of spoken English.If you know thousand words, you might not be able to say one correct sentence. But if you know one phrase, you can make hundreds of correct sentences and similarly a collocation shows your level and knowledge of the language.
3.Practice speaking- In order to speak English fluently, you need to practice speaking.Practice speaking until your mouth and brain can do it without any effort. By doing so, you will be able to speak English fluently.
NOTE-->When you want to create an English sentence, do not translate the words from your Mother tongue. The order of words is probably completely different and you will be both slow and incorrect by doing this. Instead, learn phrases and sentences so you don't have to think about the words you are saying. It should be automatic.
4.Study correct material- You should read a newspaper daily (English). You can read novels,classical works and articles on different topics on internet.
You can also read magazines and comics.
5.Watch English news channels-As you are from India and you will be talking to Indians only,the Hollywood movies will not benefit you much as they are American(generally) and this will cause problem due to difference in accent.So it's better to watch English news channels as they use the same dialect as used in India and it will also help in increasing your knowledge and you will stay updated about current affairs.
You should also watch English Talk shows as they help in quickly developing communication skills,improve non-verbal skills and up-to some extent in grooming body language.
List of some books which will help you in improving:-
1.Cambridge - English Vocabulary in Use(upper-intermediate & advanced) by McCarthy and felicity O'Dell
2.Word Power Made Easy by Norman Lewis
3.Cambridge International Dictionary of Phrasal Verbs
4.Wings of Fire by Dr. APJ Abdul Kalam
5.I, Robot by Isaac Asimov
Best Answer
They're all fine, as is simply restating without comment:
On this site it may be worth observing that nobody expects spoken English to be perfectly expressed, from native speakers or anybody else. Speech is improvised: people start a sentence with only a general idea of where it’s going, change their minds in the middle, have second thoughts, find new ideas or expressions suddenly occurring. So if you listen closely to conversations, or if you read a literal transcript, you will find that errors are abundant. On the page, excited speech may be almost incomprehensible.
Consequently, most errors in speech are ignored, by both speakers and hearers. It’s taken for granted that errors will occur, and for the most part hearers make the necessary corrections automatically, from context.
Back when I was active in theatre I always told my actors to play through errors as if they hadn’t happened—“The audience’ll never know you screwed up unless you tell them.” The same principle operates in ordinary conversation: don’t make a correction at all unless there’s a real danger that what you said will be misunderstood. In your example, for instance, there's no need to back up unless two people, one male and one female, are under discussion.