She ............. (have dinner) when the storm .......... (start).
She WAS HAVING DINNER when the storm STARTED
When mom ......... (come) home, we .................(sleeping). It was too late
When mom CAME home, we WERE SLEEPING. It was too late.
While I ........(sit) at my desk, my phone suddenly .......(ring)
While I WAS SITTING at my desk, my phone suddenly RANG.
............... you ............ (exercise) yesterday morning when the strong wind ....... (start) ?
WERE you EXERCISING yesterday morning when the strong wind STARTED?
.......... your friend ............. (buy) clothes when the thief ......... (appear) in the store?
WAS your friend BUYING clothes when the thief APPEARED in the store?
She ......... (see) the strange creature while she ........... (swim) in the river.
She SAW the strange creature while she WAS SWIMMING in the river.
My parents ............... (work) in the backyard when tons of mosquitoes ........(bite) them.
My parents WERE WORKING in the backyard when tons of mosquitoes BIT them.
