1. যে শব্দ গুলো থাকলে present indefinite tense হবে: sometimes, often, usually, ocationally, every+time (hour, day, year etc.), now and then, always, seldom, daily, regularly. e.g. I often take tea. they usually play in the morning. 2. যে শব্দ গুলো থাকলে present continous tense হবে: today, this morning, this evening, at this moment, now, continually, constantly, perpetually. e.g. My father is comming this evening. They are playing now. 3.যে শব্দ গুলো থাকলে present perfect tense হবে: just, just now, recently, lately, already, so far, yet*, ever* (*present perfect + negative/interogative) e.g. Just now he ___ his dinner but he says he will see you when she is finished (24th BCS). (a. is having, b. has had, c. was having, d. had ) Ans: b e.g. I have had my MA recently. 4. যে শব্দ গুলো থাকলে past indefinite tense হবে: yesterday, long ago, ago, long since, last+time (last night, last year etc.), just+time+ago . e.g. I met the principal yesterday. I pas...