Students should already be familiar with:
positive, negative, and question forms
The Tenses Guide includes:
Prerequisites in more detail
Irregular Verbs (1 by groups; 1 for beginners)
Time Expressions (1 for Present Perfect; 1 for Past Perfect)
Present Perfect Timelines
Slideshows for each video
Ancillary Topic on Present Perfect Continuous
5 pages of Bonus Notes such as:
With multiple auxiliary verbs, change only the 1st one.
The same word can be stative or not if it has multiple definitions.
Related Teaching Tips like Define Your Own Terms