Used To and Be Used To

Used to; expresses a habit, activity or situation that existed in the past but which no longer exists.
Example;
- Jean used to live in Singapore

Be used to; be accustomed to (to express habitual past)
Example;
- she is used to living in a cold climate
- she is accustomed to living there

The Perfect Progressive Tense

One event is in progress immediately before, up to, until another time or event.

Ø Present Perfect Progressive
I have been studying for three hours.

Ø Past Perfect Progressive
I had been studying for two hours before my friend came.

Ø Future Perfect Progressive
I will have been studying for two hours by the time you arrive

The Perfect Tense

One thing happens before another time or event

Ø Present Perfect
I have already eaten

Ø Past Perfect
I had already eaten when they arrived.

Ø Future Perfect
I will already have eaten when they arrive.

Progressive Tense

The tense say that an action begins before, is in progress during, and continues after another time or action.

Ø Present Progressive
He is sleeping right now

Ø Past Progressive
He was sleeping when arrived

Ø Future Progressive
He will be sleeping when we arrive

Simple Future Tense

At one particular time in the future, this will happen.

Examples;
Will;
- He will finish his work tomorrow
- I will watch television tonight

Be Going to;
- He is going to finish his work tomorrow
- I am going to watch television tonight

Simple Past Tense

In the past, this happened.

Examples;
- It rained yesterday
- I watched television last night

Simple Present Tense

The Simple Present expresses events or situations that exist always, usually, habitually.

Examples;
- It snows in antartica
- I watch television every day