1) become a) simple past b) past participle c) infinitive 2) been a) past participle b) simple past 3) was a) simple past b) past participle 4) build a) infinitive b) past particple 5) were a) past participle b) simple past 6) begin a) infinitive b) simple past 7) built a) infinitive b) past participle c) simple past 8) bring a) infinitive b) past participle 9) brought a) simple past b) past participle c) infinitive 10) became a) simple past b) infinitive c) past participle

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