If someone where to say "I bear a burden" the past perfect tense of "bear" would be "I bore a burden."
The past perfect tense is had borne.
The past perfect tense of choose is had chosen.
The past perfect tense is had contained.
Born is the past participle of bear. The past tense of bear is bore.
The past perfect tense of the word "slow" is "had slowed."
The past perfect tense is had committed.
Was and had been.
'Fed' is the simple past. 'I have fed' is the present perfect. 'I had fed' is the past perfect. 'I will have fed' is the future perfect. 'I would have fed' is the conditional perfect.
The present perfect tense with past participle for the word "lie" is "have lied."
You can't make a past perfect sentence with the word shake.The past participle form of the verb is used in past perfect. The past participle of shake is shaken.He had shaken his fist at me.
Simple is not a verb therefore it doesn't have a past tense. The past of perfect is perfected
The past perfect tense of any verb is created with the auxiliary verb "had" and a past participle (squeezed).I had squeezedWe had squeezedYou had squeezedHe/she had squeezedThey had squeezed