Emphasizing the right stress patterns and using proper intonation can definitely help you pronounce English idioms naturally and sound more fluent. Here are some tips to help you achieve this:

1. Listening Practice: Listening to native speakers using idiomatic expressions will help you understand the correct pronunciation, stress, and intonation patterns.

2. Mimicking Native Speakers: Practice mimicking the way native speakers say idioms. Pay attention to how they stress certain words and change the pitch of their voice.

3. Intonation Patterns: English has specific intonation patterns that can vary based on the context of the conversation. Understanding and imitating these patterns will make your pronunciation sound more natural.

4. Practice Speaking Aloud: Regularly practice saying idioms out loud. This will help you get comfortable with the pronunciation and intonation.

5. Feedback: If possible, record yourself saying idioms and compare it to a native speaker. You can also ask for feedback from native speakers or language tutors.

By focusing on stress patterns and intonation, you can improve your pronunciation of English idioms and sound more fluent in conversations. Remember that practice and consistent effort are key to mastering any language skill.