Sheep : singular or plural , Explain with example ?

Sheep :  singular or plural
Explain with example ?

RULE- कुछ nouns, singular ओर plural में समान रूप से प्रयुक्त होते है|

Sheep , fish , deer , swine(pigs) , Salman , innings , series , species , staff (कर्मचारी) , offspring , issue , police etc.

Example
■ A sheep  is running  in the field

■  The sheep  in the field  are eating grass

Reason - sheep , singular ओर plural में समान रूप से प्रयुक्त होते है|

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