The simple past and past participle are both sipped.
The past participle of "sip" is "sipped."
The past tense of "sip" is "sipped," and the past participle is also "sipped."
The past perfect tense of "sip" is "had sipped." It is formed by combining the past tense of the auxiliary verb "have" (had) with the past participle of the main verb "sip."
The past tense of sip is sipped.
The past participle of "do" is "done." The past participle of "have" is "had."
The past participle of "am not" is "have not been."
The past tense of "sip" is "sipped," and the past participle is also "sipped."
The past tense of sip is sipped.
The past perfect tense of "sip" is "had sipped." It is formed by combining the past tense of the auxiliary verb "have" (had) with the past participle of the main verb "sip."
The past participle of "am not" is "have not been."
The past participle of "do" is "done." The past participle of "have" is "had."
The past tense of "have" is "had," and the past participle is also "had."
The past and past participle for "buy" is "bought."
Being is the present participle. The past participle is been.
Eating is the present participle; eaten is the past participle.
The past participle is thought.
"Did" is the past and "done" is the past participle.
The past participle is had.