В чем заключаются особенности использования Continuous Tense со словом swim?

Continuous Tense (длительное время) со словом swim в английском языке образуется по формуле: am/is/are + глагол с окончанием -ing. www.interactive-english.ru

Некоторые формы глагола swim в Continuous Tense для разных лиц и чисел: linguabooster.com

• Present Simple Continuous (настоящее длительное) — I am swimming, you are swimming, he, she is swimming, we are swimming, you are swimming, they are swimming; linguabooster.com www.native-english.ru
• Past Simple Continuous (прошедшее длительное) — I was swimming, you were swimming, he, she was swimming, we were swimming, you were swimming, they were swimming; linguabooster.com www.native-english.ru
• Future Simple Continuous (будущее длительное) — I will be swimming, you will be swimming, he, she will be swimming, we will be swimming, you will be swimming, they will be swimming. linguabooster.com www.native-english.ru

Таким способом образуются утвердительные предложения в Present Continuous, отрицательные и вопросительные — иначе. www.interactive-english.ru