Rumus :
(+) S + Was/Were + V-ing
(-) S + Was/Were + Not + V-ing
(?) Was/Were + S + V-ing
Keterangan Waktu :
When +simple past
While +past continous
Fungsi :
Menyatakan kegiatan yang sedang berlangsung atau sedang dalam proses di masa lampau
Menyatakan dua kejadian yang berlangsung di masa lampau
Contoh :
(+) While I was studying, she was reading news paper
(+) He was sleeping when I came
(-) He was not sleeping when I came
(?) Was he sleeping when you came?
(?) What were you doing at 8.00 o'clock last night?