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....
Period of English literature
Anglo-Saxon period (450 -1066)
Middle English period (1066-1500)
Anglo-Norman period (1066-1350)
The age of Chaucer (1350-1400)
The Renaissance (1500-1660)
Non-classical period (1660-1798)