What are the rules for using relative clauses with prepositions in grammar syntax?

In grammar syntax, there are certain rules to follow when using relative clauses with prepositions. Here are the key guidelines:

1. Placement of the preposition: The preposition should be placed immediately before the relative pronoun or adverb that introduces the relative clause. For example, "The book on which I am working" or "The person to whom I was talking."

2. Omission of the preposition: In some cases, the preposition can be omitted when it is followed by a relative pronoun. This is more common in informal speech or writing. For example, "The car I bought" instead of "The car that I bought."

3. Preposition stranding: In certain situations, the preposition can be placed at the end of the relative clause, separating it from the relative pronoun. This is known as preposition stranding and is commonly used in English. For example, "The house that I live in" or "The girl whom I was talking to."

4. Prepositions with objects: When a preposition is followed by an object, the object should be placed immediately after the preposition, even within a relative clause. For example, "The book on which I am working" or "The person with whom I was talking."

5. Prepositions at the end of the sentence: It is generally considered more formal to avoid ending a sentence with a preposition. In such cases, the preposition can be moved to an earlier position within the relative clause. For example, "The book on which I am working" can be rewritten as "The book on which I am currently working."

It is important to note that these rules may vary depending on the specific context and style of writing. Therefore, it is always advisable to consult a grammar guide or style manual for further guidance.