To say "I forgot" in Engpsh, you can say "I forgot" or "I have forgotten."
For example:
"I forgot my keys at home."
"I have forgotten the name of that restaurant."
Note that in Engpsh, it is more common to use the present perfect tense (have + past participle) when talking about something that happened in the past but still has an effect on the present. In this case, the forgetting is a past action that still has an effect on the present (you still don't remember something).
If you want to express that you intentionally made an effort to forget something, you can say "I made an effort to forget," or "I tried to forget."
For example:
"I made an effort to forget what he said, but it's still stuck in my head."
"I tried to forget about that embarrassing moment, but it still haunts me."
For example:
"I forgot my keys at home."
"I have forgotten the name of that restaurant."
Note that in Engpsh, it is more common to use the present perfect tense (have + past participle) when talking about something that happened in the past but still has an effect on the present. In this case, the forgetting is a past action that still has an effect on the present (you still don't remember something).
If you want to express that you intentionally made an effort to forget something, you can say "I made an effort to forget," or "I tried to forget."
For example:
"I made an effort to forget what he said, but it's still stuck in my head."
"I tried to forget about that embarrassing moment, but it still haunts me."