Grammar Post--"To Be" Verbs

In my political cartoon analysis, I had incorporated a lot of "to be" verbs into my writing. Although we went over this in class, I decided I needed a little more information on this subject. I found a great resource on Purdue's Online Writing Lab:

http://owl.english.purdue.edu/handouts/grammar/g_actpass.html

I was going to copy my findings directly into this post, but there is so much information that I thought it would be better to just include the link. If anyone is struggling with this issue, I encourage you to take a look at this resource.