The kids clearly do NOT understand the past participle. Dude, they can't even spell it. They call it the past particle. Snerk. Particles are in atoms, not in grammar!
The past tense they've got down. They know it so well that they try to use it for other tenses, in fact!
The future tense they mostly have, except they don't seem to know that the "will" in "will run" is still part of the verb phrase.
The present tense they do NOT have all the way, either. They either use the present perfect or future or past tense. "Today I will run." Or "Today I won the game." ?!
For the past hour and a half, I have looked for materials to reinforce this. I found a bunch of different resources. One great thing I will certainly use is a table with irregular verb families and a corresponding quiz. The BBC Skillswise has some great worksheets that seem to clearly explain the different types of present and past tenses--simple present and continuous present (present perfect?) (the difference between "I dance" and "I am dancing") and simple past and continuous past ("I drove" versus "I was driving").
Many kids use the totally wrong tense in the past. Like this: "Last month I had written three poems." Or "This summer my grandma had die." It's so wrong! But to explain it is kind of complicated. I'm going to use these resources as a tool to attempt to make them see why it's wrong. If it's done and completed, then it's simple past. If it shows something that started in the past but continued, then it's past participle. If it started in the past and continued into the present when something else happened, then it's continuous past. Argh! I hope they get it.
I found a bunch of quizzes and worksheets to practice and check different tenses. I'll use those with the whole class later this week, and use some other ones as individual extra practice.
Wish me luck! More than that, wish me patience!