Hi!
I'm assuming you're talking about something like if you had a measure of two quarter notes, it would be counted as 1, 2.
The counting would be the beat which the note starts at, for example taking the two quarter notes, the first one starts on the first beat, counted as 1, and the second on the second, counted as 2.
So we can just take this beat by beat. The first one would just be 1; it's the first beat. Let's look at this note's value to get the next one's beat. This note is an eighth rest, and therefore it's valued at 1/2 of a beat. 1 + 1/2 = 1 1/2
The second note is therefore starting on the 1 1/2 beat. Any beat ending with 1/2, half a beat, is counted as &, or and. The second note would be counted as &.
Let's look at the value of the second note~ it's 1 beat, as a quarter note.
1 1/2 + 1 = 2 1/2
For the third note, 2 1/2 ends in 1/2 as well, so it would be counted as & as well.
Therefore, the counting is:
1, &, &
respectively.
Hope this helps!