be get ready for与be get ready to的区别

be get ready for与be get ready to
都是“为什么做好准备”的意思
但是用法不同
例子
When I get sleepy,I'll probably get ready for bed.
当我困倦时,我可能就要去睡觉.
He told us to get ready to resist the enemy attack.
他让我们做好准备,抵抗敌人的进攻.
get ready for后面加名词
get ready to 后面加动词