grammar

    Uses of Conjunctions
     
    a) and, if, but. because, or-এর ব্যবহার
    i) and = used to join words or sentences (শব্দ বা বাক্যকে সংযুক্ত করে)
        Rajon and Sajol are good boys. The day is wet and cold. The sun rises in the east and sets in the west. 
        He will go to market and buy a   fish. Work hard and you will pass.
    ii) If = on the condition that (যদি)
        Take this book if you like. You cannot go to school if you are ill. Don't go out if it rains. She will learn if she reads.
         Work hard if you like to pass the examination.
    iii) but = used to join words or sentences of opposite meaning (বিপরীতার্থক শব্দ বা বাক্যকে সংযুক্ত করে)
         I go to school but he does not. The knife is not sharp but blunt. My friend is rich but I am poor.
    iv) because (as) = for the reason that (কারণ / যেহেতু)
         I cannot write because (as) I have no pens. Rajon did not come because (as) he was ill. 
         He does not work because (as) he is lazy.
    v)  since = because, considering. (যেহেতু / বলে)
         It is one month since I received the letter. Since you like it, I shall give it to you. I shall go alone since you will not come.
    vi) or (অথবা/নতুবা)
         Hasan or Mahmud will come here. Write this or that. Walk fast or you will miss the train.
     
    b) therefore, though, although, when, while, whether, until, unless, till, that, before, after
    i) Therefore = অতএব, সেইজন্য, এই কারণে
        He did not work, therefore he failed. There was no milk, therefore, I could not take tea. 
        She has no money, therefore, She could not help me.
    ii) Although = Though (যদিও)
        He could not catch the train although he walked fast. He looks young though he is over 50.
    iii) When = While (যখন/যে সময়ে)
         Our lesson begins when the bell rings. We stay inside while it rains. He fell down while he was running.
    iv) Whether = কখনও if (যদি, কি-না) 
         Ask him whether he came by bus. I do not know whether he walked here.
    v) That (যে)
         The teacher told me that he was ill. I know that he is poor. I hope that he will write to me. I am sure that he will pass.
    vi) Unless = যদি না
         They will not come unless I play. We shall not go out unless you are well. They will suffer unless they improve.
    vii) Till (যে সময় পর্যন্ত), Until (যে পর্যন্ত না), before (পূর্বে), after (পরে)।
          Please wait till I come here. Wait until the bell rings. We reached the station after the train had left. 
          The train had left before we reached the station. 
     
    c) both - and (উভয়ে), as well as (এবং), either - or (দুইয়ের মধ্যে একটি), neither - nor (দুইয়ের একটিও না), not only - but also (শুধু তাই নয়, বরং), whether or not (হয় বা না হয়), so - that, as-as, such as, as if (যেন), lest (পাছে).
    i) Both Selim and his brother are absent today.
    ii) The day was wet as well as dry. He as well as his father has done this.
    iii) The day was either wet or dry. Either he or his father has done this.
    iv) You have neither money nor men to win.
    v) She is not only beautiful but also intelligent. Not only he but also his father will do this.
    vi) You will win whether you have money or not. He will come whether his father comes or not.
    vii) The stick is so thick that you can not break it.
    viii) Please try as much as you can. I never ate such a sweet mango as this. 
    ix) He talks as if he were mad. You speak as if you knew everything.
    x) He ran away lest he should be seen. Walk slowly lest you should fall.
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