Aha!或写作a-ha!作为英语中的感叹词时表示了解或发现某事物的喜悦，相当于中文的“啊哈！原来如此！”。例如：
"Aha! So you took the money!" “啊哈！所以你拿走了钱！
Aha, I've got [ guessed] it. 哈哈，我猜着了。
Aha! Here at last, the answer to my question.
啊哈，我的问题到这儿终于有了答案。
Aha, so it's you hiding there.
啊哈！原来是你躲在那儿！
Aha, now I've got you& you can't escape.
啊哈，现在我抓到你了-你跑不掉了。
Aha! I knew it! You guys are up to no good.
啊哈！我知道了！你们这些家伙果然不怀好意。
Aha, so you were the one who phoned me!
啊哈，你就是给我打电话的那个人！
Aha! So this is the boy you've been telling me about.
好呀！原来你跟我讲了半天的就是这个孩子。