Explain the usage of through, threw, and through.

The words "through," "threw," and "through" are often confused due to their similar spellings and pronunciations. However, they have different meanings and functions in the English language.

1. Through (preposition/adverb):
"Through" is primarily used as a preposition or an adverb to indicate movement from one side or end of an object, place, or situation to the other. It implies passing from the beginning to the end of something or completing a process.

Examples:
- She walked through the park and enjoyed the beautiful scenery.
- The car drove through the tunnel to reach the other side.
- He read through the entire book in one sitting.

2. Threw (past tense of "throw"):
"Threw" is the past tense of the verb "throw," which means to propel or launch something through the air using force. It is used to describe an action that has already happened in the past.

Examples:
- He threw the ball to his friend.
- She threw her bag on the floor in frustration.
- They threw a surprise party for their friend's birthday.

3. Thorough (adjective):
"Thorough" is an adjective that describes something done with great attention to detail or completeness. It implies a comprehensive or exhaustive approach to a task or examination.

Examples:
- The detective conducted a thorough investigation to solve the crime.
- She gave a thorough explanation of the topic during her presentation.
- The teacher graded the students' papers thoroughly.

To summarize, "through" is used to indicate movement or completion, "threw" is the past tense of "throw," and "thorough" describes something done with great attention to detail. Understanding the distinctions between these words will help you use them correctly in various contexts.