The simple past tense of swim is "swam".
The past participle of swim is "swum".
swam
Formed is the past tense of form.
The past tense of "lay" is "laid." For example, "I laid the book on the table."
The past tense form of "lay" is "laid."
No such word.If you are looking for the simple past tense of swim, you want swam
Is and are are present tense form of be. The past tense of be is was/were.
Yes it is the past tense form of the verb organize.
struck is the past tense verbStruck IS the past tense form...of the word strike.
The past tense form of "destroy" is "destroyed."
The negative form of "she had a nice pen" is "She did not have a nice pen" or "She hadn't a nice pen."
To is not a verb and does not have a past tense form.
Is can be used in the past tense if it's in its past tense form, which is was.