Look at the verbs. give their three forms. write them into two groups: regular verbs, irregular verbs. вот глаголы: to be, to laugh, to build, to study, to become, to happen, to burn, to describe, to read, to lock, to lead, to count, to come, to work, to keep, to join, to learn, to take, to say, to wake up, to go, to get, to know, to hear, to do. ! надо! заранее !

Irregular: to be ( was/were, been); build ( built, built); to become ( became, become);  to burn ( burnt, burnt); to read ( read, read); to lead (led, led) ; to come (came, come); to keep ( kept, kept); to learn ( learnt,learnt ); to take ( took, taken); to say ( said, said); to wake up- woke up-woken up;  to go ( went, gone);  to get (got,got); to know ( knew, known); to hear ( heard, heard);  to do ( did, done).

regular: to laugh- laughed - laughed ; to study- studied -studied; to happen- happened -happened; to describe- described -described; to lock- locked- locked;  to count - counted- counted; to work - worked- worked;  to join- joined- joined.

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