It is "cling/clings".
The present tense of clung is cling
The past tense of cling is clung. For example, "She clung to the edge of the cliff."
The past tense of "cling" is "clung" and the past participle is also "clung."
The past tense of "cling" is "clung," and the past participle is also "clung."
The past tense of "cling" is "clung." For example, "She clung to the safety rail as the boat rocked."
The past tense of cling is clung. The past participle of cling is also clung.
The past of cling is clung. eg The children clung to the rope in the dark
That's it - cling Cling = base form clung = past clung = past participle clinging = present participle
"Has" is the present tense form of the verb "have." The past tense form of "has" is "had."
The present tense form of "were" is "are."
"Is" is the present tense form of the verb "to be" and "has" is the present tense form of the verb "to have."
Have is already present tense.