Сводная таблица времен английского глагола

Present

Past

Future

Simple

I usually work in the morning.

Last year I worked for IBM.

Next year I will work for Opel.

Continuous

I am working in the office now.

I was working in the office when the chief called me.

I will be working in the office when the meeting starts tomorrow.

Perfect

I have worked for some companies during my career.

I had worked for two companies before I joined IBM.

I will have worked for Opel by the time I get the certificate.

Perfect

Continuous

I have been working for the foreign company for several years.

I had been working for IBM for a year before I got a new proposal.

I will have been working for Opel for a year by the time I get the certificate. 

Present

Past

Future

Simple

I write letters every day.

Yesterday I wrote a letter to my friend.

Tomorrow I will write a letter to my parents.

Continuous

I am writing a new letter now.

I was writing a letter when someone rang.

I will be writing a letter when a friend of mine comes tomorrow afternoon.

Perfect

I have just written a letter.

I had written a letter before I left.

I will have written a letter by the time I leave.

Perfect

Continuous

I have been writing a letter for half an hour.

I had been writing a letter for half an hour before I left.

I will have been writing a letter for half an hour by the time I leave.