Round is a regular verb so past and past participle are rounded.
He rounded the total to the nearest dollar.
The past tense of round is rounded.
"Has" is the present tense form of the verb "have." The past tense form of "has" is "had."
The past tense form of "destroy" is "destroyed."
struck is the past tense verbStruck IS the past tense form...of the word strike.
Formed is the past tense of form.
The past tense form of "lay" is "laid."
The past tense form of "hold" is "held."
Is and are are present tense form of be. The past tense of be is was/were.
"DO" can be present tense (third person singular form is "does") as well as past tense (past simple form is "did").
Did not do it -> did not do it (same past tense form)
The past tense of "that" is "that." It remains the same in the past tense.
Yes, "is" is present tense. The past tense form of "is" is "was."