在英语公开课中，鼓励用语是非常重要的，因为它们能够激发学生的积极性、增强他们的自信心，并提高学习效果。以下是一些常用的英语公开课鼓励用语：

That's great!/ Great!

That's it!/ Exactly!/ Right on!

That's not bad!/ Not too bad!

That's a good girl/boy!

That's really nice!/ 挺好的!/ That's coming along nicely!

Wow!

Have a try, please!/ Try again, please!

I knew you could do it!

I'm very proud of you!

All right!/ 好!/ 行!/ Exactly!/ 一点不差!/ Right on!

Congratulations!

You couldn't have done better yourself!

Excellent!/ 太好了!/ 棒极了!

Extraordinary!/ 棒极了!

Fantastic!/ 真了不起!/ 棒极了!

Good for you!

Good job!/ 做得好!/ That's what I call a fine job!/ 好事一桩!/ 真棒!

You're doing a good job!

Keep up the good work!/ 持续做，你在进步!

You're improving!

Hurray For You!

You're on target!

You're on your way!

How Nice!

That's incredible!

Hot Dog!

You're special!

You're beautiful!

这些鼓励用语可以根据具体的教学情境和学生表现进行灵活运用，以达到最佳的激励效果。