当你在商店询问某件商品的价格时，可以使用以下几种常用的英语表达方式：

How much is it？

What is the price of...？

How much do you ask for it？

How much do you want for it？

What does it cost？

How much shall I pay for it？

How much will that be altogether？

What's the regular price？

例如，如果你想买一件T恤，你可以这样问：

"How much is this T-shirt？"

"What is the price of this T-shirt？"

"How much do you ask for this T-shirt？"

如果你想买一双袜子，你可以这样问：

"How much is a pair of socks？"

"What is the price of a pair of socks？"

如果你想买一条裤子，你可以这样问：

"How much are two pairs of trousers？"

"What is the price of two pairs of trousers？"

通过这些表达方式，你可以很自然地询问商品的价格，从而进行有效的沟通。