If students understand, really understand, these four lines, they will know most, maybe all, of what they need to know about the perfect tenses.
1.) John lived in Nashville for 10 years (but now lives in Amarillo).
2.) John has lived in Nashville for 10 years (and still does).
3.) When John moved to Amarillo, he had lived in Nashville for 10 years.
4.) When John moves to Amarillo, he will have lived in Nashville for 10 years.
.brad.mon.13sept10.