A diphthong in English is a phoneme composed of two vowel phonemes. The following are some common English diphthongs:

1. /e?/: such as "say", "rain", "day".

2. /a?/: Such as "buy", "high", "my".

3. /?/: Such as "boy", "coin", "noise".

4. /?/: Such as "go", "show", "note".

5. /a?/: Such as "how", "now", "town".

6. /?/: Such as "ear", "fear", "tear".

7. /e?/: Such as "air", "care", "stare".

8. /?/: Such as "tour", "pure", "cure".

9. /i?/: Such as "see", "tree", "meet".

10. /u?/: Such as "blue", "true", "school".

What should you pay attention to when learning English pronunciation

1. Learn the International Phonetic Alphabet: Understanding the International Phonetic Alphabet can help you accurately understand and pronounce English words. Master the basic phonetic symbols and the pronunciations they represent.

2. Pay attention to the pronunciation of vowels and consonants: There are many ways to pronounce vowels and consonants in English. Pay special attention to the differences between different phonemes and practice correct tongue position, mouth shape, and airflow control.

3. Listening training: Improve auditory perception by listening to English materials, such as recordings, audio books, movies or English music. Try to imitate and repeat the sounds you hear to strengthen phoneme memory and accuracy.

4. Observe the mouth shape: Observe the mouth shape of native English speakers, especially the movements of the lips, tongue and throat. Imitate their mouth shapes to help improve your pronunciation.

5. Practice pronunciation: practice pronunciation by reading aloud, reading along, practicing speaking, etc. You can use recording equipment to conduct self-assessments and pay attention to correcting errors in pronunciation.