Tom is one of the most gullible people that I know.

One great grey bird, a gull or curlew, soared aloft in the blue heaven. He and I seemed to be the only living things between the huge arch of the sky and the desert beneath it.

Most gulls include crabs and small fish in their diet.

I doubt Tom and Mary are really that gullible.

Tom said that Mary was gullible.

Sami is very gullible.

How gullible does Tom think we are?

I'm not a gullible person.

Tom is really gullible, isn't he?

Tom says I'm gullible.