The third form of "wait" is "waited."
The third form of the English word "receive" is "received".
No, the contraction let's is a short form for let us; the pronoun 'us' is the first person, a word that takes the place of the nouns for the speaker and one or more other people as the object of a verb 'let'.Example: Let's take lunch to the park for a picnic. (Let us take...)
The third form of the word "split" is "split." In English grammar, there is usually not a separate form for the third form, as it remains the same as the base form.
The third form of shine is shone.
The negative form for "let us" is "let us not" or the contraction "let's not".
It can be a verb or a noun: "He grunted in assent" - Verb. "He let out a grunt of assent" - Noun.
The third person form of arrive is "arrives."
The third form of shrink(i.e. to minimize something in size or miniature things) is Shrunk
The past tense of let is let. "Let" is one of the so-called "invariant" verbs: its present, past, and past participle are all "let". However, it is not literally invariant, because its third person singular present tense form is "lets" (note lack of apostrophe!).
Chao only evolve twice, so there is no third form.
One third is already in it's simplest form.