它不是小河用英文怎么说

"它不是小河"用英语可以说成"It is not a small river."

这句话的来源是你所说的中文句子"它不是小河"，它指的是一个物体不是小河。

下面是一些例句：

"The river that runs through the city is not a small river. It's actually quite wide and deep." (这条流经城市的河并不是小河。它实际上很宽很深。)
"I thought the stream in the forest was a small river, but it turns out it was just a shallow creek." (我原以为森林里的小溪是小河，但是它原来只是浅浅的小溪。)
"The river that runs through our town is not very big, but it's still bigger than a small river." (流经我们镇的河不是很大，但它仍然比小河大。)