Put the verb in brackets into the Past Indefinite, the Past Continuous and the Past Perfect.
1) When I_______________ (look) out of the window, the sun ______________ (approach) the horizon and dark clouds _______________ (overspread) the sky.

2) It already _______________ (begin) to grow dark; the cold autumn wind ___________ (whistle); clouds ______________ (creep) over the sky.