Review exercise J : Compound intonation of numbers
In short phrases （#1 and #2 ）, ~teen can be thought of as a separate word in terms of intonation. In longer phrases, the number + ~teen becomes one word. Repeat after me.
1. How old is he? He's fourteen. He's forty.
2. How long has it been? Fourteen years. Forty years.
3. How old is he? He's fourteen years old. He's forty years old.
In short phrases （#1 and #2 ）, ~teen can be thought of as a separate word in terms of intonation. In longer phrases, the number + ~teen becomes one word. Repeat after me.
1. How old is he? He's fourteen. He's forty.
2. How long has it been? Fourteen years. Forty years.
3. How old is he? He's fourteen years old. He's forty years old.