Letting.
The present perfect tense of let is: have/has let
Let does not change from present tense to past tense. Let is also the past participle.
Getting is the present participle of get.
The present participle is doing.
Being is the present participle. The past participle is been.
I/You/We/They let. He/She/It lets. The present participle is letting.
The present perfect tense of let is: have/has let
Let does not change from present tense to past tense. Let is also the past participle.
"Let" is one of the "invariable" irregular verbs; its present, past, and past participle are all "let".
Getting is the present participle of get.
The present participle is doing.
Being is the present participle. The past participle is been.
Presenting is the present participle of present.
Presenting is the present participle of present.
The present participle is choosing.
The present participle is walking.
The present participle is cleaning.