Is reading
is watering
isn't watching
are,doing
is listening
is eating
is playing
is sleeping
Philo Farnsworth was the first inventor to transmit a television image comprised of 60 horizontal lines.
Valdemar Poulsen was the Danish telephone engineer and inventor of the 19th century.
Some history books state that Pierre and Ernest Michaus invented the first bicycle during the 1860s.
My friend (c)has been working here since 1985. - Present Perfect Continuous
1. l used to eat pizza almost every day!
2. Did there use to be a supermarket on the corner?
3. Bradley is a teacher, but he used to want to be a train driver.
4. I didn't use to like eating cabbage, but now l love it.
5. Did Rick use to have blond hair when he was a little boy?
6. I know Lily didn't use to cook much, but now I think she makes dinner every day.
1) Tropical...climates....are hot and humid.
2) The heavy snowfall may...prevent..us from going out.
3) Bringing up children is a difficult...task....
4) Global.....warming...affects the sea level.
5) That scientists is an...expert....on fossil fuels.
6) Something has to be done before more animals and plants become..extinct..
7) Cars ..release... fumes and pillute the atmosphere.
8) He promised to come but then he..changed...his mind.
9) We can all ..make....a difference to the environment.
10) Gorillas are an...endangered....species.