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The present continuous is used to talk about present situations which we see as short-term or temporary . We use the present simple to talk about present situations which we see as long-term or permanent.

In these examples, the action is taking place at the time of speaking.

• It's raining.
• Who is Kate talking to on the phone?
• Look, somebody is trying to steal that man's wallet.
• I'm not looking. My eyes are closed tightly.

In these examples, the action is true at the present time but we don't think it will be true in the long term.

• I'm looking for a new apartment.
• He's thinking about leaving his job.
• They're considering making an appeal against the judgment.
• Are you getting enough sleep?

In these examples, the action is at a definite point in the future and it has already been arranged.

• I'm meeting her at 6.30.
• They aren't arriving until Tuesday.
• We are having a special dinner at a top restaurant for all the senior managers.
• Isn't he coming to the dinner?

Gerund after prepositions (adjectives)

Gerund/Infinitive - Explanations

Gerund/Infinitive - Exercises

We use the Gerund after prepositions.

adjective + preposition

We use the Gerund after the following phrases:
afraid of	They are afraid of losing the match.
angry about/at	Pat is angry about walking in the rain.
bad at good at	John is good at working in the garden.
clever at	He is clever at skateboarding.
crazy about	The girl is crazy about playing tennis.
disappointed about/at	He is disappointed about seeing such a bad report.
excited about	We are excited about making our own film.
famous for	Sandy is famous for singing songs.
fed up with	I'm fed up with being treated as a child.
fond of	Hannah is fond of going to parties.
glad about	She is glad about getting married again.
happy about/at	The children are not happy about seeing a doctor.
interested in	Are you interested in writing poems?
keen on	Joe is keen on drawing.
proud of	She is proud of riding a snowboard.
sick of	We're sick of sitting around like this.
sorry about/for	He's sorry for eating in the lesson.
tired of	I'm tired of waiting for you.
used to	She is used to smoking.
worried about	I'm worried about making mistakes.

Thanks to Josef and Ulrike.

if I were you - if I was you - which is correct?

Conditional sentences (if-clauses, main clauses)

Summary

Type I

Type II

Type III

Special types and structures

Mixed Conditionals

if I were you

will and would in if-clauses

Replacing if - Omitting if - if vs. when - in case vs. if

Conditional sentences (if) - Complex Test 1

Exercises - Conditional sentences (if)

The word were in the phrase if I were you is special form. It is known as the subjunctive mood (from the grammatical point of view).

Today you also find the phrase if I was you. Here the Simple Past form of be is used. But there are people who say that this phrase is incorrect and would never use it (mainly Americans). Others say that this phrase can be used.

If I were you I would phone him. - subjunctive mood 
If I was you I would phone him. - Simple Past

Gerund after prepositions (adjectives)

Gerund/Infinitive - Explanations

Gerund/Infinitive - Exercises

We use the Gerund after prepositions.

adjective + preposition

We use the Gerund after the following phrases:
afraid of	They are afraid of losing the match.
angry about/at	Pat is angry about walking in the rain.
bad at good at	John is good at working in the garden.
clever at	He is clever at skateboarding.
crazy about	The girl is crazy about playing tennis.
disappointed about/at	He is disappointed about seeing such a bad report.
excited about	We are excited about making our own film.
famous for	Sandy is famous for singing songs.
fed up with	I'm fed up with being treated as a child.
fond of	Hannah is fond of going to parties.
glad about	She is glad about getting married again.
happy about/at	The children are not happy about seeing a doctor.
interested in	Are you interested in writing poems?
keen on	Joe is keen on drawing.
proud of	She is proud of riding a snowboard.
sick of	We're sick of sitting around like this.
sorry about/for	He's sorry for eating in the lesson.
tired of	I'm tired of waiting for you.
used to	She is used to smoking.
worried about	I'm worried about making mistakes.

Thanks to Josef and Ulrike.

can - to be able to, to be allowed to

Modals - Explanation

may

must

Exercise: can, to be able to

We often use to be able to or to be allowed to instead of "can". We can only form the Past of "can" (could). To put "can" into other tenses we need the phrases to be able to or to be allowed to.

Affirmative sentences

Tense	Modal	Form
Simple Present	I can play football.	I am able to play football. I'm able to play football.
		I am allowed to play football.  I'm allowed to play football.
Simple Past	I could play football.	I was able to play football.
		I was allowed to play football.
will-future	Do not use can in the will-future.	I will be able to play football. I'll be able to play football.
		I will be allowed to play football.  I'll be allowed to play football.

Other possible tenses:
e.g. Present Perfect: I have been able to play football.

Negations

Tense	Modal	Form
Simple Present	I cannot play football. I can't play football.	I am not able to play football. I'm not able to play football.
		I am not allowed to play football.  I'm not allowed to play football.
Simple Past	I could not play football. I couldn't play football.	I was not able to play football. I wasn't able to play football.
		I was not allowed to play football. I wasn't allowed to play football.
will-future	Do not use cannot in the will-future.	I will not be able to play football. I won't be able to play football.
		I will not be allowed to play football.  I won't be allowed to play football.

Questions

Tense	Modal	Form
Simple Present	Can he play football?	Is he able to play football?
		Is he allowed to play football?
Simple Past	Could he play football?	Was he able to play football?
		Was he allowed to play football?
will-future	Do not use can in the will-future.	Will he be able to play football?
		Will he be allowed to play football?