‘Wait here until I return’. This sentence is an example of -

• ‘Wait here until I return’. This sentence is an example of - Complex sentence.

• Complex sentence:
- যে sentence এ একটি Principal clause এবং এক বা একাধিক Subordinate clause থাকে, তাকে Complex sentence বলে।
- Complex sentence এর subordinate clause এর শুরুতে সাধারণত if, though, although, as, because, since, so that, that, until, till, unless, when, why, who, which, where, how, before, after, whether, while বসে।
সুতরাং, নিয়মানুযায়ী -‘Wait here until I return’. হচ্ছে complex sentence.