Unit 1 - am/is/are (positive/negative)

Positive

I am

he/she/it is

we/you/they are

I'm

he/she/it 's

we/you/they 're

Negative

I am not

he/she/it is not

we/you/they are not

I'm not

he/she/it is not ('s not, isn't)

we/you/they are not ('re not, aren't)