1) To study a) Simple form b) Infinitive c) Gerund d) Past 2) Wrote a) Simple form b) Infinitive c) Gerund d) Past 3) Riding a) Simple form b) Infinitive c) Gerund d) Past 4) Bought a) Simple form b) Infinitive c) Gerund d) Past 5) Drive a) Simple form b) Infinitive c) Gerund d) Past 6) Have a) Simple form b) Infinitive c) Gerund d) Past 7) Laughing a) Simple form b) Infinitive c) Gerund d) Past 8) Catching a) Simple form b) Infinitive c) Gerund d) Past 9) To fly a) Simple form b) Infinitive c) Gerund d) Past 10) To work a) Simple form b) Infinitive c) Gerund d) Past

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