I [could / couldn't] reach the top shelf when I was seven.
?
I [could / couldn't] speak English when I was four.
?
I [could / couldn't] count to 100 when I was five.
?
I [could / couldn't] read a book when I was six.
?
I [could / couldn't] snap my fingers when I was five.
?
I [could / couldn't] swim when I was three.
?
I [could / couldn't] whistle when I was six.
?
I [could / couldn't] write my name when I was four.
?
I [could / couldn't] tie my shoes when I was five.
?
I [could / couldn't] catch a big ball when I was three.
?