How does the speakers use of imagery and descriptive language to describe the tiger being "made" affect the mood of the poem. Cite evidence from the poem

Principal parts of the verb Shake:

Present: He shakes. (third person singular - he,she or it)

Present Participle: Shaking

Past: Shook.

Past Participle: Shaken.

Explanation: In most cases principal parts of verbs forms, are derived from the root form, which is not conjugated. It does not have a prefix nor a suffix. It is accompanied by a "To" before the word. Therefore: To Shake. (the infinitive form)

When the root form of a verb form, forms the other principal parts of the verb, it is said to be a regular verb such as play and live.  

In the case of "To Shake", this is an irregular verb because not all the forms of conjugation follow the regular norm:

1.Present - adding (s) or (es) to the root word - in this case it follows the norm. Example: It shakes its fur.

2.Present Participle - adding (ing) to the root word. - in this case it follows the norm. Example: The dog is shaking its fur after a good bath.

3.Past - adding (ed) to the root word - does not follow the norm. - Shook.                                                                                         Example:  The dog shook its fur after the bath.

4.Past participle - adding (have, has and had + ed) to the root word- does not follow the norm. - Had shaken.                      Example: Before I could get hold of the dog's chain it had shaken its fur and splashed water on the visitors.