Using the Verb 'To Be' in English

source: Oxford Online English       2016年2月22日
In this English lesson you’ll learn how to use be in simple sentences and questions. You can learn how to make negatives and short forms with the verb 'be'.
The full version:

Topics included in this lesson:
- Forms of the verb 'to be'
- Making simple sentences with 'be'
- Making negatives with 'be'
- Short forms (contractions) of 'be'
- Simple questions using 'be'