The centerpiece of this slide set is the first slide; a very handy summary of the 3 tenses and 4 aspects in English.
The next slide can be used to highlight the idea that it's good to learn the tense/aspect forms, but that you will eventually have to learn to grapple with the tense/aspect semantics; that is, when, where, and how to actually use them. What you can tell the students is that it's one thing to become a tense/aspect "strong man," knowing how to correctly form them, but that you eventually need to understand how to use them; how to "dance," as it where....
From here, it's your call as to where you want to start talking about semantics.
An introdution to Modals
An introduction to the Passive Voice
A very nice slide summarizing basic conjugations of to be, to do, and to have.
Slides that explain the most fundamental parts of speech.
One slide that tersely diagramizes the Subject, Object, and Possessive pronouns for singular vs. plural, and the three "persons" (1st, 2nd, and 3rd).
A few slides with historic perspectives on Free Speech (and political action) in the U.S.
What kinds of "rules" are there in creating titles for essays or stories? Answer: None that are "hard and fast" in the usual sense. But let's look at some real-world titles and see if we can get the idea....