Present simple / past simple
Mixed tense
present perfect simple / present perfect continuous
present continuous / past continuous
Active -> Passive
100

Water ...................... ( freeze) at 32 degrees Fahrenheit.

Freezes

100

I ........... (work) for this company for more than thirty years and I ........ (intend) to stay here until I retire.

I have been working for this company for more than thirty years and I intend to stay here until I retire.

100

I ......... (cycle) and my legs are really tired now.

have been cycling

100

At the moment , the kids ......................(play) in the garden.

are playing

100

The Government is planning a new road near my house

[ A new road is being planned near my house ]

200

He usually ......................(wake up) at 7 and ...............(go) to school by bus.

wakes up - goes

200

Sharon ........ (love) to travel. She goes abroad almost every summer.

Sharon loves to travel. She goes abroad almost every summer.

200

I'm sorry I'm late, ....... (wait) for a long time?

have you been waiting

200

I ...................... (read) a magazine when you ........................(call) me.

I was reading - called

200

My grandfather built this house in 1943.

[ This house was built in 1943 by my grandfather ]

300

She .......... (go) to Australia in 1994 and she liked it very much.

went

300

Thomas ........ (to be) an author who .......... (write) since he was a child. Altogether he has written seven novels and three collections of short stories.

Thomas is an author who has been writing since he was a child. Altogether he has written seven novels and three collections of short stories.

300

How long ......... (know) Peter?

 have you known

300

Clara ______ (study) in the U.S. next year. 

is studying

300

Picasso was painting Guernica at that time.

[ Guernica was being painted at that time by Picasso ]

400

My father usually ........... (like) his steak well-done.

likes

400

We ........ (to be) late because we had some car problems. By the time we got to the train Susan .......... (wait) for us for more than two hours.

We were late because we had some car problems. By the time we got to the train Susan had been waiting for us for more than two hours.

400

I ...........................(work) for this company for more than thirty years, and I intend to stay here until I retire!

have worked

400

The boys ...........................(swim) while the girls .............................(sunbath) .

were swimming - were sunbathing

400

The cleaner has cleaned the office.

[ The office has been cleaned ]

500

The dog .......... (eat) its toy last night.

ate

500

Every day I ............. (wake) up at six, eat breakfast at seven and leave for work at eight. However, this morning I ........ (get) up at 6:30, ......... (skip) breakfast and ........ (leave) for work late because I ........ (forget) to set the alarm.

Every day I wake up at six, eat breakfast at seven and leave for work at eight. However, this morning I got up at 6:30, skipped breakfast and left for work late because I forgot to set the alarm.

500

Somebody .......(eaten) my cookies. There are none left.

has eaten

500

A team of observers ....................... (monitor) the elections right now. 

is monitoring

500

He had written three books before 1867.

[ Three books had been written before 1867 ]