September 5th keen on

Hi, I think at school I was taught this construction:

keen on + gerund 

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What does it mean to ‘know a word’?

Inout Session


Straight to the Point

Warm up - Talking about classes, about how many hours of classes per week.
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S u CC e SS fu LLY

2 VERB TENSES

12 CONJUGATIONS

3 Perfect Tense

Have you ever had...
Past Perfect/ Present Perfect Progressive
4 Forms on the Board

FUTURE
By the time
How will
Had the course begun
Have you ever talked

Future Perfect - meaning Approach

P.

Form.
Clarification MPF

Pres. Perfect
Have you ever
Key problems
Pres. Perfect

B)In the meantime - the past up to this moment - expresses unfinished action
unfinished past action
C) recent action - wich produces a kind of result in the present - expressed
recent indefinite past actions

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So, for example, I would write or say: 

I'm keen on improving my English.
She is keen on making new friends.

Lately, I have often heard and seen this construction:

keen to + infinitive

For example, on CNN I heard this phrase:

Companies are keen to show their latest products at CEBIT.

Does this mean that both constructions are correct? Is there a difference between them?

Thank you all, my English language friends ;-).
Nicole