I'm afraid ______ (lose) my key.I can't find it now

I'm afraid ______ (lose) my key.I can't find it now
I'm afraid ______ (lose) my key.I can't find it now

I'm afraid ______ (lose) my key.I can't find it now
I'm afraid that I have lost my key.I can't find it now
或
I'm afraid to have lost my key.I can't find it now

to have lost
祝你学习愉快！ (*^__^*)
请及时采纳，多谢！

我也觉得用to have lost，我恐怕丢了钥匙，已经丢了，动作完成了造成的结果就是后面的cannot。。。