Вставь на место точек am .is.are 1) Her shirt ....... not

1) Her shirt is not dirty.

2) Is Bill fat? Yes, he is.

3) We are in the park.

4) I am not big.

 Am, is, are are the present forms of the auxiliary verb to be. We dont use to be, we use its forms. Am is used for the first person singular. The first person singular is I. Is is used for the third person singular. The third person singulars are he, she, it. He is used for male. She is used for female. It is used for objects and animals. Are is used for plural.