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What is the principal part of the underlined verb in the sentence?

Our neighbors recently installed a new outdoor lighting system.

A.
present

B.
present participle

C.
past

D.
past participle

User Nyasha
by
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1 Answer

2 votes
The answer is choice C. past since the action has already happened.  It is not being done in the present moment.  The action is complete. 
User Pimp Trizkit
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