用英语多少手指怎么说

In English, you can use the phrase "how many fingers" to ask someone to hold up a specific number of fingers. For example, if you wanted to ask someone to hold up three fingers, you could say: "Can you hold up three fingers for me, please?"

Alternatively, you could also say: "Can you show me three fingers, please?" or "Can you hold up a three, please?"

If you want to specify which hand the fingers should be held up on, you can add the phrase "on your left/right hand" or "with your left/right hand." For example: "Can you hold up three fingers on your left hand, please?"