This tense is called... I was sleeping
Past continuous
What is it made of?
glass
What is this?
wood
After "while" we use
Was/Were+ Ving
Past continuous goes with
Was/Were + Ving
What are they made of?
Plastic
What is it made of
Cotton
What is this
metal
what is this?
leather
What is this?
paper
What is this?
cardboard
After "When" we use
-ed or 2nd column (Past simple)
what is this?
wool
Past Simple goes with
2nd column or -ed
this tense is called... I ate the cake
Past Simple