i – a – u: sing – sang – sung
The vowel goes i in the infinitive, a in the Past Simple and u in the Past Participle.
7 verbs: begin, drink, ring, shrink, sing, sink and swim. Practise them in the trainer.
Tasks
i – a – u: sing – sang – sung
The vowel goes i in the infinitive, a in the Past Simple and u in the Past Participle. 7 verbs: begin, drink, ring, shrink, sing, sink and swim.


