if ever she failed to open the front door and to leave the bread on the kitchen table.

if ever she failed to open the front door and to leave the bread on the kitchen table.
以上的句子中,if ever she failed 为什么是不是fail ,if ever后面不是用一般现在时态么?
然后,to leave 为什么是要加to ,不加to 不是也很顺畅?