What's the past tense for cast away? Is it right to say 'I was cast away 3 months ago'?
I am a bit confused about this after reading this: Can "casted" be the past tense of "cast"?
What's the past tense for cast away? Is it right to say 'I was cast away 3 months ago'?
I am a bit confused about this after reading this: Can "casted" be the past tense of "cast"?
Yes, you are correct. "Cast" is an irregular verb that is written and pronounced exactly the same in all tenses.
Here's a somewhat silly, yet very useful, article on irregular verbs, featuring a complete list of those:
Is it right to say 'I was cast away 3 months ago'?
It's grammatically okay ("cast" being fine in all the tenses), but logically it is not a very compelling sentence (unless you have recently returned to civilisation and you are describing what happened to you).
Also "3" should be "three" in most written forms.