I have a stomachache.

我胃痛。

I have a stomachache. May I have some medicine?

我胃痛，能给我开点药吗？

Now I have a stomachache, and I want to have a check.

我现在胃痛，想检查一下。

It is a nice kettle of fish! I have a stomachache.

这是一锅好鱼，(可惜)我胃痛。

Wang Hong: Aaaah, I feel sick. I have a stomachache.

王红：啊，我感觉不舒服，我肚子疼。

I have a stomachache because I ate a green peach yesterday.

我胃疼，因为我昨天吃了未熟的桃子。

Wendy: My mother cooked me a big breakfast this morning, and now I have a stomachache.

温迪：今天早上我妈妈给我做了很多吃的，我现在胃痛了。

I have a little stomachache. But it doesn't matter.

我有点胃疼，不过没什么。

I have a high fever, stomachache, and headache.

我发高烧，胃痛，头痛。

I have a terrible stomachache and I can't bear it.

我胃痛得要命，我忍受不了。

I have a really bad stomachache.

我胃痛得很厉害。

One day, I have a headache and a stomachache.

有一天，我头痛和胃痛。

Why do I always have a stomachache?

为什么我总是胃痛？

A: Yes, I have a terrible stomachache.

是的，我胃疼得厉害。

I have a headache, and she has a stomachache.

我头疼，她胃疼。

I have got a headache. (stomachache, toothache, earacke)

我头疼。

Mary: I have a terrible stomachache.

玛丽：我的胃痛得要命。

I have a terrible stomachache.

我的胃痛得要命。

Yes, I have a terrible stomachache.

是的，我胃疼得厉害。

I have a terrible stomachache, I can't bear it.

我胃痛得要命，我忍受不了。