The present tense of crept is creep.
Crept is a verb. It's the past tense of creep.
Softly is the adverb because its the one that describes the verb which is crept.
NO
No.
Please restate your question to cut out the ambiguity and post again.
I'm not sure which phrase you are asking about. This sentence has quite a few of them. Rattling and sputtering - this is a participle phrase used as an adverb the old car - this is a noun phrase that Martina had - this is a relative clause crept up the hill - this is a verb phrase, consisting of the verb "crept" and the complement "up the hill", which is a prepositional phrase
In the sentence "rattling and sputtering" describes the state of the old car, indicating that it is making noise and struggling to operate. "The old car" is the subject of the sentence, and "that Martina had crept up the hill" is a relative clause that provides additional information about the car, specifying that it was driven by Martina. Together, these phrases create a vivid image of the car's condition and its action.
The past participle of "crept" is "crept." It remains the same in both the past tense and past participle forms.
The future tense of crept is will creep.
Crept is a verb. It is past tense of creep.
infinitive: creep past: crept past participle: crept
Crept is the past tense and the past participle of the verb to creep.
The past tense of "creep" is "crept".
Crept is already the past tense of creep.
The present tense of crept is creep.
the crept in the house is very harmful.