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Ans 1/ word stress:-The stress placed on syllabus within words is called word/lexical stress.

Ans2/sentence stress:- The stress placed on words within sentences is called sentence/prosodic stress.
Ans 3/content word:-Content words are the words such as nouns,most verbs,adjectives and adverbs that refer to an object,action or charactereistic
Ans 4/grammatical word:-Function words (or grammatical words or synsemantic words or structure-class words) are words that have little lexical meaning or have ambiguous meaning
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