is
ukstrong /ɪz/ weak /z/ /s/ usstrong /ɪz/ weak /z/ /s/
（he、she或it 做主语时be 的形式）
he/she/it form of be
- More examples
- The surname 'Smith' is very common in Britain.
- This machine is easy to use.
- Salt is a compound of sodium and chlorine.
- This is your room - it is rather small, I'm afraid.
- Grandfather gets quite confused sometimes, and doesn't even know what day it is.