Designed purposely to torture you, irregular verbs stray from the usual -ed form in
the past tense. The irregularity, which doesn’t entitle you to the sale price the way it
does for irregular sheets or other things that are actually useful, continues in a form
called the past participle. You don’t need to know the terms; you just need to know
what words replace the usual -ed verb configuration (sang and sung instead of singed,
for example).
You can’t memorize every possible irregular verb. If you’re unsure about a particular
verb, look it up in the dictionary. The definition will include the irregular form.
Here’s a set of irregular problems to pickle your brain. Fill in the blanks with the correct
irregular form, working from the verb indicated in parentheses. Notice that the
parentheses don’t, strictly speaking, contain a verb at all — just the ancestor of that
particular verb family, the infinitive. Check out the following example.