How to Pronounce is and up?

Correct pronunciation for the word "is and up" is [ɪz and ˈʌp], [ɪz and ˈʌp], [ɪ_z a_n_d ˈʌ_p].

What are the misspellings for is and up?

The personal forms of the verb "is" in present tense are:

1st person singular: I am

2nd person singular: You are

3rd person singular: He/She/It is

1st person plural: We are

2nd person plural: You are

3rd person plural: They are

As for the phrase "is up" in present tense, it can be used in all of the above forms depending on the subject. For example:

I am up.

This graph shows how "is and up" have occurred between 1800 and 2008 in a corpus of English books.