"Filled" is the past tense as well as the past participle.
No, it is not a preposition. It is a verb form, past tense and past participle of "to fill", and can be used as an adjective.
The past tense is was or were.The past participle is been.
Present tense: lead Present participle: leading Past tense: led Past participle: led
The past tense of "being" is "was" and the past participle is "been."
The simple past tense is did. The past participle is done.
The past tense of "has" is "had" and the past participle is also "had."
The past tense and past participle are both had.
The past tense of "have" is "had" and the past participle is also "had."
The past tense of "get" is "got" and the past participle is also "got."
The past tense of "is" is "was" and the past participle is "been."
The past participle of fill is filled.
Past tense: bit Present participle: biting Past participle: bitten