I'm not sure what you are trying to say here, but you could reword it to say "I slept through the morning." or "I slept during the morning." In a literal use of the sentence you give, you would use past.
I slept past morning.
You should use "past" in this sentence. It should be written as: "I slept past morning." This indicates that morning had already ended or that you slept through the morning.
When trying to use the word sleep in a past tense style, the proper grammatical version of the word is "slept." "I was so tired at work this morning as for the past two nights, I have slept horrible" is a sentence which uses the past form of sleep in a correct fashion.
The past tense of "sleep" is "slept" and the past participle is also "slept."
The past tense of sleep is slept. The past participle is also slept.
The past participle of "sleep" is "slept."
The past participle of "to sleep" is "slept."
When trying to use the word sleep in a past tense style, the proper grammatical version of the word is "slept." "I was so tired at work this morning as for the past two nights, I have slept horrible" is a sentence which uses the past form of sleep in a correct fashion.
"Because of his Fever, Alex slept solidly for ten hours." or "I slept at Stella's house because I had lost my keys again." Remember that 'slept' is a past tense of 'sleep'.
The past tense of "sleep" is "slept" and the past participle is also "slept."
Slept is the past tense and past participle of sleep.
The past tense of sleep is slept. The past participle is also slept.
The past participle of "sleep" is "slept."
sleep/slept/slept
The past participle of "to sleep" is "slept."
The past participle of "sleep" is "slept."
I cycled to school this morning.
From isn't a verb and so doesn't have any tenses. The past participle of slept is slept.
The past tense of "sleep" is "slept."