Purple Book 2
Page 19
Sentences with When and While
Sentences with
When and While 
2.
While it was flying,
it saw a bus.
5.
While the bus driver
was driving the bus,
he saw some elephants.
7.
The visitors in the bus
quickly took photographs
of the elephants
while they were walking
between the trees.
8.
When the visitors
got to their tents
in the camp,
they were feeling excited.
9.
While they were waiting outside,
someone took their bags
into their tents.
11.
When they got near the river,
some lions were drinking water
and a hippopotamus
was taking a bath.
Say the correct sentences:
Sentences with
When and While
2.
While it ________ (fly),
it _________ (see) a bus.
5.
While the bus driver
________ (drive) the bus,
he ________ (see) some elephants.
7.
The visitors in the bus
quickly ________ (take) photographs
of the elephants
while they ________ (walk)
between the trees.
8.
When the visitors
________ (get) to their tents
in the camp,
they ________ (feel) excited.
9.
While they ________ (wait) outside,
someone ________ (take) their bags
into their tents.
11.
When they ________ (get) near the river,
some lions ________ (drink) water
and a hippopotamus
________ (take) a bath.