what is the exact verb of swam

Present: swim

Present participle: swimming
Past tense: swam
Past participle: (have) swum.

Examples:
Emily swam ten lengths of the pool yesterday.

Emily has often swum in that pool.

http://www.merriam-webster.com/dictionary/swim

i do not get it

i get it now

The exact verb form of "swam" is the simple past tense of the verb "swim." To find this form, you can follow these steps:

1. Identify the base form of the verb: In this case, the base form is "swim."
2. Determine the tense: In this case, we are looking for the simple past tense.
3. Apply the appropriate ending: For regular verbs like "swim," the simple past tense generally adds "-ed" to the base form.
4. Combine the base form with the appropriate ending: "Swim" + "-ed" = "swam."

Therefore, "swam" is the exact verb form of "swim" in the simple past tense.