have no choice but to do but后什么时候加do什么时候加to do

……but to do sth,but后加to do 是不是只限用于I have no choice but to do cannot choose but do&have no choice but to do do nothing but do 与have no choice but to do 与can't but do have no choice but to do sth.have nothing to do but do sth. can't ...but后面什么时候加do什么时候加to do? have no choice but to do还是have no choices but to do? 关于cannot but do；can't help but to do;have no choice but to d 英语中 but后面加do 还是 to do 例子 we dont have a choice but to do 例子2 have no choice but to do 还是doing I have no choice but to do it. 关于I have no choice but to do cant help doing,cant help but do,have no choice but to do,co