IV. Writing

If you don't use your mobile phone a lot, you don't have large phone bills.

If you didn't use your mobile phone a lot, you wouldn't have large phone bills.

If you don't use your mobile phone a lot, you won't have large phone bills.

If you won't use your mobile phone a lot, you won't have large phone bills.

If I am you, I tell your parents the truth.

If I am you, I will tell your parents the truth.

If I were you, I would tell your parents the truth.

If I were you, I will tell your parents the truth.

If I insert a CD, my computer will crash.

If I insert a CD, my computer crashes.

If you want my computer to crash, insert a CD.

Unless you want my computer to crash, insert a CD.

If heated long enough, water boils.

If water is heated long enough, it boils.

If you heat water long enough, it boils.

All are correct.

If you water plants and flowers, they can't live.

If you water plants and flowers, they will live.

If you don't water plants and flowers, they can't live.

Unless you water plants and flowers, they live.

Researchers are developing low-cost devices that can detect water pollutants in rivers and lakes.

Researchers are developing low-cost devices to detect water pollutants in rivers and lakes.

Researchers are developing low-cost devices so that they can detect water pollutants in rivers and lakes.

Researchers are developing low-cost devices who can detect water pollutants in rivers and lakes.

While carrying out projects to develop a city, urban planners look at the needs of local people and the environment when they do this.

While carrying out projects to develop a city, urban planners look at the needs of local people and the environment.

If they carry out projects to develop a city, urban planners look at the needs of local people and the environment when they do this.

As carrying out projects to develop a city, urban planners look at the needs of local people and the environment.

Not only most Superstar City Dwellers are quite happy with their life and work but also Barbara and Mark are quite happy, too.

Most Superstar City Dwellers along with Barbara and Mark are quite happy with their life and work.

Like most Superstar City Dwellers, Barbara and Mark are quite happy with their life and work.

Barbara and Mark are like most Superstar City Dwellers because they are quite happy with their life and work.

For there is shortage of fresh water, wastewater is treated and turned into drinking water.

Wastewater is treated and turned into drinking water because there is shortage of fresh water.

Wastewater is treated and turned into drinking water though there is no shortage of fresh water.

To ensure there is no shortage of fresh water, wastewater is treated and turned into drinking water.

The infrastructure of our city needs upgrading, for it's in an extremely poor condition now.

The infrastructure of our city needs upgrading though it's in an extremely poor condition now.

While the infrastructure of our city needs upgrading, it's in an extremely poor condition now.

The infrastructure of our city needs upgrading when it's in an extremely poor condition now.

Mary told Jack to go on and apply for the job.

Mary suggested applying for the job.

Mary said that Jack would apply for the job.

Mary encouraged Jack to apply for the job.

I do not know much about Jean’s success in the institute.

It is difficult for Jean to be successful in the institute.

Jean’s success in the institute was not to be known.

Jean hardly become known and successful in the institute

The old man is working in this factory which I borrowed his bicycle yesterday

The old man whom I borrowed his bicycle yesterday is working in this factory.

The old man whose bicycle I borrowed yesterday is working in this factory.

The old man whom is working in this factory I borrowed his bicycle yesterday.

Neither Mary or her two brothers like sport.

Either Mary nor her two brothers likes sport.

Neither Mary nor her two brothers like sport.

Either Mary or her two brothers like sport.

Some kinds of fish live in fresh water, for others live in sea water.

Some kinds of fish live in fresh water, so others live in sea water.

Some kinds of fish live in fresh water, or others live in sea water.

Some kinds of fish live in fresh water, and others live in sea water.