Сравните употребление Past Simple, Past Continues и Past Perfect (раскройте скобки)
1. When l (to come) home, my mother (to go) shopping.
2. When l ( to come) home my sister ( to read) a book which she ( to bring) from the library

1. When l came home, my mother had gone shopping.

2. When l came home my sister was reading a book which she had brought from the library

1. When l to comeing home, my mother to going shopping.

2. When l to comes home my sister to reading a book which she to bringing from the librery.