Tenses         

Rule

Time Expressions

Simple Past

Sub+ was ,were +P.P +by +agent

Did+ Sub+ Vinf…?

Sub+ didn't+ Vinf…

Yesterday, ago, time in the past, last+  time

Past Continuous

I, he, she, it)was+ Ving)

(We, they, you)were+ Ving

When, While, As, Just as

Past Perfect

He, she, it, I, we, they, you+ had + P.P

Before, after, as soon as, no sooner,( when-already

Simple Present

He, she, it+ Vs/es

I, we, they, you +Vinf

He, she, it+ doesn't+ Vinf

I, we, they, you +don't+ Vinf

Does+ he, she, it + inf

Do+ I, we, they, you+ inf     

Always, sometimes, often, usually, normally, frequently, occasionally, daily, weekly, monthly, yearly, every+ adv

Present Continuous

I+am+  Ving

He, she, it + is + Ving

We, they, you+ are+ Ving

Now, at the moment, in this min, look, listen, be, quit

Present Perfect

He, she, it+ has+ P.P

I, we, they, you+Have+ P.P

Since, for, yet, already, just, so for, never, ever, lately, recently, at last

Simple Future

Sub+ will, shall+Vinf

Tomorrow, until, in the future, next+ adv

Future perfect

Sub+ will have+ p.p

By+ time in the future