I found a very useful video which can help you to learn the past of some irregular verbs.
Below you can see a video song with all the verbs in the past and present perfect. You already know a lot of them.
GRAMMAR
First, review how to write sentences in the negative form and how to make questions. REMEMBER: ONLY 1 PAST IN THE SENTENCE. If you use "did" you already have one past in the sentence, so you need to use the verb in the infinitive form.
WORKSHEETS
Now do the following worksheets to practice and learn the past tense.
In this first worksheet, do activity 2 first and then number 1. When you finish, check how to write negative sentences in the picture above and then you do activity 3.
Before you send the worksheet to your teacher, check your answers and you can see and mark your own errors and learn from them.
You know that a regular past tense verb fisnishes with -ed. However, there are some spelling rules you should know. Watch the video:
You can see more examples in the following video.