Explain adverbial clauses of purpose and cause with examples.

Here are the descriptions with examples:

1. a. Adverbial clause of purpose. An adverbial clause of purpose states the reason or intention behind the action in the main clause. It typically answers the question "Why?" and is introduced by subordinating conjunctions like so that, in order that, or lest.

   Example:

   • She studied hard so that she could pass the exam.

2. b. Adverbial clause of cause. An adverbial clause of cause explains the reason or cause for the action described in the main clause. It also answers the question "Why?" and is introduced by subordinating conjunctions such as because, since, as, or for.

   Example:

   • He was late for work because his car broke down.