I met a man with whom I used to work.' This is an example of -

• Complex Sentence এ একটি principle clause ও এক বা একাধিক sub-ordinate clause থাকবে।
- Complex Sentence এ Conjunction হিসাবে like, who, whom, which, that, when, how, where, while, if, though, although, until, till, whether, before, after, so that ইত্যাদি বসে।