PBS Newshour 1

Delegates from 28 nations, including the U.S. and China, agreed Wednesday to work together to contain the potentially “catastrophic” risks posed by galloping advances in artificial intelligence.
 
– What is the subject of this sentence?
The subject of the sentence is delegates from 28 nations.
 
– Is the subject singular or plural?
Delegates from 28 nations is a plural subject.
The singular form is delegate.
 
– What is/are the tense(s) used in this sentence?
Delegates from 28 nations … agreed
Subject + past simple
This sentences uses the past simple tense.
 
– Is this an active or passive sentence?
Delegates from 28 nations … agreed
The subject is the one doing the action.
The sentence uses active voice.
 
– Is there a noun, adjective or adverb clause in this sentence?
Delegates from 28 nations, including the U.S. and China, agreed Wednesday to work together to contain the potentially “catastrophic” risks posed by galloping advances in artificial intelligence.
 
the potentially “catastrophic” risks
= noun phrase
 
posed by galloping advances in artificial intelligence.
= reduced adjective clause
 
An adjective clause gives additional information to a noun or noun phrase.
 
the potentially “catastrophic” risks posed by galloping advances in artificial intelligence.
= reduced adjective clause
 
the potentially “catastrophic” risks that are posed by galloping advances in artificial intelligence.
= full adjective clause
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