Here are some key details about adverb clauses:

1. Introduction:

   • Adverb clauses are introduced by subordinating conjunctions, such as "after," "although," "because," "if," "since," "when," "while," and many others.
   • The choice of subordinating conjunction depends on the type of information the adverb clause provides.
   • Examples:
     • Time: "I will call you when I arrive."
     • Condition: "If it rains, we will stay indoors."

2. Function:

   • Adverb clauses modify verbs, adjectives, or other adverbs by providing information about time, place, manner, condition, reason, purpose, or contrast.
   • They answer questions such as "when," "where," "how," "why," "if," and "although."
   • Examples:
     • Time: "He left when the movie ended."
     • Place: "She looked wherever she could."
     • Reason: "I didn't go to the party because I was tired."

3. Placement:

   • Adverb clauses can appear at the beginning, middle, or end of a sentence.
   • When an adverb clause appears at the beginning of a sentence, it is usually followed by a comma.
   • Examples:
     • Beginning: "When I finish my work, I will go to the party."
     • Middle: "I will go to the party if I finish my work."
     • End: "I will go to the party when I finish my work."

Adverb clauses provide valuable information that adds depth, context, and specificity to sentences. They help clarify the time, place, manner, reason, or condition of an action, providing a more comprehensive understanding of the sentence. Understanding how to construct and use adverb clauses allows for more precise and nuanced expression of ideas.