Was Deactivated Verb Form?

The past tense of deactivate is deactivated. The third-person singular simple present indicative

Which verb form used with was?

When you use was or been you are creating a past participle, so you need to use the past participle form of the verb. The same rule applies with the past perfect: Incorrect example: it had been knew. Correct example: it had been known.

What is the 2nd and 3rd form of Able?

The past tense of able is abled. The third-person singular simple present indicative form of able is ables. The present participle of able is abling. The past participle of able is abled.