Here's a breakdown:
* Introductory Phrase: A group of words that lacks a subject or verb and sets the stage for the main idea.
* Example: *After the long, tiring journey,* (introductory phrase) *the travelers finally reached their destination.* (main clause)
* Introductory Clause: A group of words with a subject and verb that provides background information or sets a condition.
* Example: *Because the weather was so bad,* (introductory clause) *we decided to stay indoors.* (main clause)
The main clause is the core of the sentence, containing the subject and verb that express the central idea. It's what the introductory phrase or clause is leading up to.
Here are some other possibilities:
* A comma: Often used to separate an introductory phrase or clause from the main clause.
* A dash: Can be used for a more dramatic or emphatic effect, particularly with longer introductory elements.
* A semicolon: Used to join two closely related independent clauses, but typically not directly following an introductory phrase or clause.
Ultimately, the specific element that follows an introductory phrase or clause depends on the structure and purpose of the sentence.