English functions are important to understand the purpose of communication. English learners and teachers can easily understand and explain the functions using YouTube videos and channels. One of  useful channels is
https://www.youtube.com/user/AlexESLvid/channels?shelf_id=3&view=49

This channel has a lot of videos which explain functions by capable teachers with the usage of an easy language. Beginners and advanced English learners can benefit from it, even teachers can take a glance of what it’s contain. I recommend my colleagues and readers to visit this link and discuss the function of some the expressions that have been mentioned.

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