英语大神快进来it takes me about 20minuters to walk to school 两个to都分

it takes me about 20minuters to walk to school
= I spend about 20minuters walking to school .
花费时间做某事的用法.
it takes time to do sth
sb waste time dong sth.
to walk to school 中前面的是it takes time to do sth搭配的用法,后面的to 的是介词.
如果改为回家则是：it takes me about 20minuters to go home.就没有第二个to,home是地点副词 其前面不能加介词to .