-ing forms 6: without breaking

1 after all prepositions
When we put a verb after a preposition, we normally use an -ing form (‘gerund’), not an infinitive.
You can’t make an omelette without breaking eggs, (NOT … without to break eggs.)
Always check the oil before starting the car. (NOT .. . before to-start the car.) We got the job finished by working sixteen hours a day.
He’s talking about moving to the country.
They painted the house instead of going on holiday, (NOT … instead to go-…) ?
2 to as a preposition: I look forward to .. .ing
To is actually two different words. It can be an infinitive marker, used to show that the next word is an infinitive (e.g. to sudm, to laugh). It can also be a preposition, followed for example by a noun (e.g. She’s gone to the park, I look forward to Christmas).
When to is a preposition, it can be followed by the -ing form of a verb, but not normally by the infinitive. Common expressions in which this happens are look forward to, object to, be used to, prefer (doing one thing to doing another), get round to, in addition to.
In the following examples, note how the preposition to can be followed by either a noun or an -ing form.
– I look forward to your next letter.
I look forward to hearing from you. (NOT … to hear 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 washing up sooner or later.
I’ll get round to doing the washing up sooner or later.
A few verbs and adjectives are used with to before nouns, but are followed by the infinitives of verbs. Examples are agree, consent, entitled, inclined, prone. She agreed to our plan. / She agreed to do what we wanted.
He’s inclined to anger. / He’s inclined to lose his temper.
Accustomed
can be followed by to + -ing form or an infinitive (see -ing forms 7: remember, go on etc + -ing or infinitive.11).
3 object + infinitive after for. for her to arrive
Note that some verbs are followed by for + object + infinitive. An -ing form is not usually possible in these cases.
We’re still waiting for her to arrive, (NOT … waiting for her arrivingr)
Can you arrange for us to get tickets? (NOT … for our getting tickets?)
For the difference between used to + infinitive and be used to + -ing form, see used + infinitive-5.
For -mg forms after conjunctions (e.g. When planning a holiday …), see participles 4: clauses.6.
For time clauses with on + -ing form, see participles 4: clauses.6.