Схема Грамматических времен для младшей и средней школы

Active Voice

Tense Signals

Passive Voice

Present

Past

Future

Simple

Often, usually, always, seldom etc.

On Monday, a day ago, yesterday, in 2003 etc.

Next month, in a day, tomorrow etc.

Progressive

Now, at this moment.

At 5 o'clock, at noon, from 5 till 7, while etc.

At 5 o'clock tomorrow

Perfect

Never, ever, already, yet, this month, just etc.

By 5 o'clock, before, by that time etc.

By 5 o'clock