The past participle is "designed".
The simple past tense is 'designed'.
Future perfect is formed with will + have + past participle.The past participle of repair is repaired, so the future perfect is -- will have repairedHe will have repaired the car by now.
designed
Designed is both the simple past and the past participle of 'design'.
The three perfect tenses of a verb are the present perfect (have/has + past participle), the past perfect (had + past participle), and the future perfect (will have + past participle).
Past perfect is formed with - had + past participle.The past participle of shout is shoutedTherefore the past perfect verb is -- had shouted
Simple past perfect is 'I have tried'. Past perfect continuous is 'I have been trying'. Past perfect subjunctive is 'I had tried'
The past perfect of "think" is "had thought."
Had turned is the past perfect construction. Use had + past participle to create the past perfect tense.
You can't form past perfect tense with went. Went is the past of go.The past perfect is formed with -- had + past participle.The past participle of go is gone, past perfect = had gone
The past perfect tense of "ask" is "had asked."
The past perfect tense of open is 'had opened'.
There is no past perfect tense of sat. Sat is the past tense and past participle of sit.There is a past perfect of sit.Past perfect is formed with had + past participle. The past participle of sit is sat. So the past perfect of sit is: -- had sat.eg We had sat in the car all day.
past perfect is 'had kicked'
The past perfect tense is created with the auxiliary verb had and a past participle. The past perfect tense of stay is had stayed.
Present Perfect TenseSubject + Have/Has + Past Participle.Past Perfect TenseSubject + Had + Past Participle.Future Perfect TenseSubject + Will + Have + Past Participle.