Some idiomatic expressions involving conjunctions are:

1. “Not only…but also”: This expression is used to emphasize a contrast or addition, typically showcasing that something is true in both mentioned contexts. For example, “He is not only intelligent but also hardworking.”

2. “As well as”: This expression is used to indicate something in addition to what has already been mentioned. For example, “I am proficient in Spanish as well as French.”

3. “At the same time”: This expression is used to show simultaneous actions or occurrences. For example, “She is a hardworking student and a dedicated athlete at the same time.”

These common expressions play a crucial role in enhancing meaning in everyday English by providing clarity, emphasis, and coherence to the message being communicated. They help connect ideas effectively, making the communication more precise and nuanced.

Conjunctions like “not only…but also,” “as well as,” and “at the same time” contribute to making communication more natural and idiomatic by enabling complex ideas to be expressed fluidly and clearly. They help in structuring sentences and linking related thoughts and actions, creating a smooth flow of information in conversations or written texts.

These idiomatic expressions with conjunctions are widely used in English language communication to convey meaning efficiently and express various relationships between ideas.