Introductory clause is placed at the beginning of a sentence.
Introductory clauses are also called Introductory dependent clauses
Introductory clause is a clause that act as addition to the main thought of a sentence.
Introductory clause qualifies and clarifies statement about the main sentence.
Example of an introductory clause:
If they want to be successful, student must read their books.
In conclusion, Introductory clauses are mostly are at the beginning of a sentence, although they can be placed at the end as well without changing the meaning of the sentence, but it is not common.
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