it could only get over the mountains if it rose to 10000 feet

问题描述:

it could only get over the mountains if it rose to 10000 feet
书上说only+if 是只有...才
可以这么样这句话 不对阿
如果是if +only 这样只有..才 这样才能和翻译对上
不太明白..这句话

本句 是与现在情况相反的虚拟语气
if.、、、、only.
if it rose to 10000 feet ,it could only get over the mountains