PERFECT GERUND OR PERFECT PARTICIPLE. We switched off the lights before we went to bed; The boy asked his mother’s permission and then went out to

PERFECT GERUND OR PERFECT PARTICIPLE
 
1.    We switched off the lights before we went to bed.
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2.    The boy asked his mother’s permission and then went out to play.
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3.    He had dumped a lot of rubbish on to the beach. He denied it
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4.    We have done two tests today, so we are exhausted.
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5.    Denis had taken an active part in the Green Summer activities. He was rewarded for that.
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6.    She had been to disco the night before and she overslept in the morning.
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7.    “You’ve lied to us,” the villagers said. The politician denied.  
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8.    She had not slept for two days and therefore she wasn’t able to concentrate.
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9.    Many volunteers had saved the lives of hundreds of wild animals. Thank you for that.
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10.    I had not ridden a horse for a long time and I found it very difficult to keep in the saddle.
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