There are basically three irregular verb forms in English:
1.The base form (or bare infinitive): draw, lead, read, dream
2. The past tense (also called preterite): drew, led, read, dreamt or dreamed
3. The past participle (sometimes called perfect participle): drawn, led, read, dreamt or dreamed
As you can see from the examples above, some of the forms are completely different (draw - drew - drawn), some have a different infinitive, but the two other ones are the same (lead - led - led), some have the same spelling, but different pronunciation (read - read - read), some can be both regular and irregular (dream - dreamt/dreamed - dreamt/dreamed) and some have the same spelling and pronunciation (set -set -set).
List of irregular verbs (pdf)
There are hundreds of such words in English. In the two lists below you will find the following:
You can download them for free to your computer and print them easily.
Printable worksheets (pdf)
You can download the following printable worksheets in pdf with exercises for elementary, pre-intermediate and intermediate esl students for free and print them easily.
Online exercises on irregular forms
If you want to practise all three irregular forms, try and see our present, past and future perfect pages containing the explanation and a lot of online interactive exercises with answers.
And, of course, you can also try and see a lot of other exercises practising the English tenses where you will learn how to use the irregular forms in typical English sentences.
Finally, if you are looking for printable grammar rules and exercises in pdf, you might want to have a look at E-grammar printables and Esl worksheets at our website (see the first and last items in the red menu on the left). You can download all the materials for free and print them easily.