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I am very very confused about active passive and past participle adjective.

I can't easily understand some sentences are of passive or active.
e.g.
The device is no longer connected.
(Active or Passive or Past participle adjective)
This issue will only get reproduced if the following steps are done.
(Active or Passive or Past participle adjective).
Ask the waiter to switch off the lights if they are not needed.
(Active or Passive or Past participle adjective).
Consider it done.
(Active or Passive or Past participle adjective).
Internet connection got disconnected yesterday.
(Active or Passive or Past participle adjective).
Is there any rule(S) to identify active or passive voice or past participle adjectives?
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In general, if the sentence does not say that something happened, in other words, if there's no action, then most likely the past participle is an adjective. Otherwise, if the past participle is preceded by a form of "be" or "get", it's probably passive. Otherwise, if the past participle is preceded by a form of "have", or if there's no past participle in the sentence at all, it's probably active.

There are two sentences among your examples that illustrate this well:

The device is no longer connected. (No action. Nothing happened.)
The internet connection got disconnected yesterday. (Something happened.)
harry1999Is there any rule(S) to identify active or passive voice or past participle adjectives?
See Passive voice vs Adjective

Note especially the "tests for being an adjective".

CJ
Comments  
Please try to do the exercise first. We don't home work.
 CalifJim's reply was promoted to an answer.