问一个词的用法 burn
它的语态搞不清楚,什么时候该用主动什么时候该用被动形式.
例：Walking in the hot sand,you may even have your feet____.
例：--- Oh,dear,I smell something ______.
--- God,my fish.
不是填burning就是burned啦
还有它的相关词组 burn up ,burn down ,burn to the groud.
应该是sth burn down 还是be burned down