英语介绍朋友几岁怎么说

To introduce a friend's age in English, you can say something like "This is my friend John. He is [age] years old." For example, if John is 25 years old, you can say "This is my friend John. He is 25 years old." If you want to give more information about your friend, you can add additional details such as their occupation or interests. For example, you could say "This is my friend John. He is 25 years old and works as a software developer. He enjoys playing soccer in his free time."