"With", "Like", "As Well As"

"With", "like", and "as well as" are prepositions that if words joined to a singular subject by these prepositions, they always take a singular verb.

Examples:

Peter, with his friends, is in the class.

The boy, like the father, has curly hair.

Emma, as well as Anna, is playing with dolls.

The singular verbs in the examples above are in red.

But beware of the following example: Peter and his friends are in the class.

If preposition "and" is used, a plural verb is applied.

"Either", "Neither" and "Too"

Let's examine the following examples:

Either John or Mary has a camera.

It menas that "one of them (John or Mary) has a camera" but it can't be both having cameras.

Neither John or Mary has a camera.

It means that "no one of them has any cameras" or both of them don't have any cameras.

John has a camera, Mary does too.

It means that John and Mary have two cameras, each camera belongs to each one of them.

The last example (John has a camera, Mary does too) can be substituted by: "Both John and Mary have cameras".