Explain the concept of prepositions of substitution and provide examples.

Prepositions of substitution are used to indicate a replacement or alternative for something or someone. They are used to show that one thing or person is being used or considered in place of another. These prepositions help to establish a relationship between the substitute and the original entity.

Examples of prepositions of substitution include:

1. Instead of: This preposition is used to indicate that one thing or person is being used or chosen in place of another. For example, "I will have tea instead of coffee."

2. Rather than: This preposition is used to express a preference for one thing or person over another. For example, "She prefers to stay at home rather than go out."

3. In place of: This preposition is used to indicate that one thing or person is being used or considered as a substitute for another. For example, "He was appointed in place of his predecessor."

4. As a substitute for: This preposition is used to show that one thing or person is being used or considered as an alternative for another. For example, "She used honey as a substitute for sugar in the recipe."

5. In lieu of: This preposition is used to indicate that one thing or person is being used or chosen instead of another, especially in formal or legal contexts. For example, "He received a gift card in lieu of a cash bonus."

These prepositions of substitution help to clarify the relationship between the substitute and the original entity, providing a clear understanding of the replacement or alternative being considered or used.