许愿用英语是make a wish。
解释：
make a wish 英[meik ? wi?] 美[mek e w]
[词典] 许愿，企图，幻想;
[例句]I must make a wish first.
我一定要先许个愿。
She said if you make a wish, it will come true.
她说，如果你许个愿，它会实现。
If I could make a wish, that's what I'd have.
如果让我许个愿的话，我想要那个东西。
Happy birthday! You can make a wish now.
生日快乐！现在你来许个愿吧。
At the horary courier station, I want to make a wish, calling forever;
在时间的驿站，我要许一个心愿，叫永远；
When did you make a wish? Jane: I made a wish before blowing out the candles.
你什么时候许的愿？简：在吹灭蜡烛前许了个愿。