35 min
The Infinitive vs
the -ING Form 2
1 topic
1 task
SPYMASTER
Mission 30
1.
In the previous mission, we discussed verbs that are used with either an infinitive or an -ING form. There are adjectives like that as well.
1. ACCUSTOMED TO, COMMITTED TO
These two are unusual since TO can be seen as either a particle or a preposition.


  • I’m not accustomed to give personal information about myself to strangers.
  • I’m not accustomed to giving personal information about myself to strangers.
  • He’s committed to provide for his family.
  • He’s committed to providing for his family.
2. AFRAID
To talk about fear of things that happen accidentally, we prefer afraid of -ING.

  • I don’t like to drive fast because I’m afraid of crashing.
  • Why are you so quiet? — I'm afraid of waking the children.


In other cases, we can use afraid of -ING or afraid + infinitive with no difference in meaning.

  • I’m not afraid to tell her the truth.
  • I’m not afraid of telling her the truth.
3. CERTAIN AND SURE
Certain / sure of -ING are used to refer to the feelings of the person one is talking about.

  • Before the game she felt certain of winning, but after a few minutes she realised it wasn’t going to be so easy.
  • You seem very sure of passing the exam. I hope you’re right.


Certain / sure + infinitive refer to the speaker’s or writer’s own feelings.

  • The repairs are certain to cost more than you think.
  • Jackson’s sure to win — the other guy hasn’t got a chance.
  • He is sure to succeed. = I am sure that he will succeed.
4. INTERESTED
To talk about reactions to things one learns, interested + infinitive is commonly used.

  • I was interested to read in the paper that scientists have found out how to talk to whales.
  • I’m interested to see that Alice and Jake are going out together.
  • I shall be interested to see how long it lasts.


To talk about a wish to find out something, both interested in -ING and interested + infinitive are common.

  • I’m interested to find out what she did with all that money.
  • I’m interested in finding out what she did with all that money.

  • Aren’t you interested to know whether I’m pregnant?
  • Aren’t you interested in knowing whether I’m pregnant?


To talk about a wish to do something, we use interested with an -ING form.

  • I’m interested in working in Switzerland.
5. SORRY
Sorry for / about -ING is used to refer to past things that one regrets. That-clauses are also very common in an informal style.

  • I'm sorry for losing my temper this morning.
  • I'm sorry about losing my temper this morning.
  • I'm sorry that I lost my temper.


More formally, sorry + perfect infinitive can be used with the same meaning.

  • I'm sorry to have woken you up.= I'm sorry that I woke you up.


Sorry + infinitive is used to apologise for current situations – things that one is doing or going to do, or that one has just done.

  • Sorry to disturb you – could I speak to you for a moment?
  • I'm sorry to tell you that you failed the exam.
  • Sorry to keep you waiting – we can start now.
2.
NOUNS
NOUN + OF -ING
NOUN + OF -ING: cost, effect, fear, habit, likelihood, possibility, probability, problem, prospect, risk, sign.

  • He's got into the habit of biting his nails when he's nervous.
NOUN + TO-INFINITIVE
NOUN + TO-INFINITIVE: ability, attempt, concern, decision, desire, determination, failure, inability, permission, proposal, reason, refusal, reluctance, (un)willingness

  • His unhappy childhood explains his reluctance to talk about his parents.
NOUN + OF -ING / TO-INFINITIVE
NOUN + OF -ING / TO-INFINITIVE (similar meaning, usually after the):

  • Do staff have the opportunity of taking unpaid leave?
  • Do staff have the opportunity to take unpaid leave?

  • The aim to provide clean drinking water has been achieved.
  • The aim of providing clean drinking water has been achieved.

With chance, sense and way, the meaning will be different depending on the form:

  • What's the chance of getting five heads when you toss a coin five times? (= likelihood)
  • Will you get the chance to visit Miki in Japan? (= opportunity)

  • He didn't have the sense to move away from the puddle of water as the bus went past. (= good judgement)
  • Everyone was very friendly and she had a sense of belonging within a few days of moving to her new school. (= feeling)

  • I've got a new way to cook rice. (= method)
  • She has a really funny way of speaking. (= manner)



Note also that OF + -ING usually follows no / every / the sole / the slightest / (not) any / with the + ambition, idea, intention, option, plan but that we can use either OF + -ING or a to-infinitive in most other cases. Compare:

  • I have no intention of lending Dan any more money.
  • He announced his intention to stand in the election.
3.
Note that TO could be a PREPOSITION, not a PARTICLE:

  • I look forward to your next letter.
  • I look forward to hearing from you.

  • Do you object to Sunday work?
  • Do you object to working on Sundays?

  • I'm not used to London traffic.
  • I'm not used to driving in London.

  • I prefer the seaside to the mountains.
  • I prefer swimming to walking.

  • I'll get round to the dishes sooner or later.
  • I'll get round to doing the dishes sooner or later.
END OF GUIDE
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