Choose the correct sentence-

A. Sami has been working here for April.

B. Sami is working here since April.

C. Sami has been working here since April.

D. Sami has been worked here since April.

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সঠিক উত্তরঃ C. Sami has been working here since April.

Explanation: RD(1)-192; একটি কাজের সূচনালগ্ন বোঝাতে present perfect conitnuous tense এ since ব্যবহৃত হয়। যেমন- since---8 o’clock, Monday,12 May, April, 2001, lunch time, we arrived, I got up অপরদিকে একটি কাজ কতক্ষণ ধরে হচ্ছে তা বোঝানোর জন্য for ব্যবহৃত হয়। যেমন- for--- two hours, 20 minutes, five days, a long time, six months, 50 years, a week, ages, years