The formula is "Each of the [plural noun] [is/has/singular verb ] ..." Each of the companies has its own CEO.

1. Project A and Project B, each [BECOMES] a separate company (become or becomes ?) 2. Each of this company has its own CEO [EACH OF THESE COMPANIES HAVE/HAS ITS OWN CEO] 3. Each of the student has a handphone [EACH OF THE STUDENTS HAVE/HAS A HANDPHONE] 3. Each of these companies have [OR HAS] their own CEO 4. Each of these companies has its own CEO

each (adjective) means every one of two or more considered individually or one by one... so singular. - each car is new. (singular noun) - each student studies very hard. (singular noun) However, if we are talking about one OF 2 or more, then the noun is plural and the verb is in the plural form: - each of the cars are new. (noun is plural / verb is plural form) - each of the students study very hard. (noun is plural / verb is plural form) When the pronoun is followed by an 'of' phrase containing a plural noun or pronoun, there is a tendency for the verb to be plural: "Each of the candidates has(or have) spoken on the issue." Some usage guides maintain that only the singular verb is correct, but plural verbs occur frequently even in edited writing. [So, it looks like the verb can be in the singular or plural verb form] This word is very interesting and the grammar rules are not rigid/firm/set in stone, so you may want to read more about the adjective 'each': http://dictionary.reference.com/browse/each?s=t ... Read the Usage Note