Looking on the internet deeply has found these results:

I have not sleep is the most popular phrase on the web.

I have not slept 1377,000 results on the web	I have not sleep 1439,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
I'm sorry, but I have not slept for 68 hours. Because I have not slept since we've got here and I think my body is shutting down. I have not slept a wink the night after that. And did I mention that I have not slept in almost two days? I have not slept well in eight nights. I have not slept for about 20 hours. I am on day two of a panic attack and I have not slept at all. I have not slept all night.	Because... ...I have not had much sleep lately. Four days in a row, I have not had any sleep. It is not sleep we seek. I could not sleep, of cβnd I received the letter. I did not sleep last night, for thinking of our conversation. Mr President, I have not had much sleep over the last few nights because of the Italian elections and because I was trying to follow the results, but I did, however, manage to dream that I was in a Western. Tonight the Castles did not sleep in his room. I did not sleep for one second last night.

I have not slept

1377,000 results on the web

I have not sleep

1439,000 results on the web

More popular!

I'm sorry, but I have not slept for 68 hours.
Because I have not slept since we've got here and I think my body is shutting down.
I have not slept a wink the night after that.
And did I mention that I have not slept in almost two days?
I have not slept well in eight nights.
I have not slept for about 20 hours.
I am on day two of a panic attack and I have not slept at all.
I have not slept all night.

Because... ...I have not had much sleep lately.
Four days in a row, I have not had any sleep.
It is not sleep we seek.
I could not sleep, of cβnd I received the letter.
I did not sleep last night, for thinking of our conversation.
Mr President, I have not had much sleep over the last few nights because of the Italian elections and because I was trying to follow the results, but I did, however, manage to dream that I was in a Western.
Tonight the Castles did not sleep in his room.
I did not sleep for one second last night.