Употребление ing

- ing формы
существительное в функции подлежащего
Filming is a very exciting process.
после глаголов, выражающих предпочтения:
love, like/dislike, prefer/enjoy/hate
They enjoy spending time together.
после глаголов, выражающих деятельность:
admit, appreciate, avoid, consider, continue, deny, fancy, go, imagine, mind, miss, practiсe, prevent, save, suggest
Fancy meeting you here.

после выражений: be busy, it’s no use, it’s no good, it’s (not) worth, can’t help, can’t stand, have trouble, have difficulty (in), what’s the use of
It is worth seeing. I can’t help admiring it.
What’s the use of doing it?
после глаголов - органов чувств, выражающих незавершенное действие: hear, listen to, notice, see, watch, feel
She noticed him crossing the street.
после глаголов: spend, lose, waste ( о деньгах, времени и.т.д.)
Не spent hours playing computer games.

после предлогов to/for/of с глаголами и выражениями: think of, apologise for, object to, look forward to, be used to, in addition to, prefer(для выражения предпочтения), object to
She prefers reading to watching TV.
I apologized for being late.
To-Infinitive or –ing Form
после глаголов: begin, intend, start, continue
She started to write/writing.
They began to clean/cleaning the floor.
после глаголов: advise, allow, encourage, permit, require
She permitted staying at home.

To+ Infinitive
после глаголов, выражающих отношение к будущему: agree, appear, decide, expect, hope, plan, promise, refuse, want, e.t.c.
They promised to be in time.
после выражений предпочтения: would like, would prefer, would love e.t.c.
I would like to go there.
после прилагательных, выражающих эмоции: happy, glad, sad
Ann was glad to come back there again.
для выражения цели (чтобы) :
I want to do it to achieve better results.
после too/enough
She was tired enough to do the household chores.

Infinitive
после модальных глаголов: сan, must, should, may
We must keep the Earth clean.
после глаголов: let, make, see, hear, feel, help(может употребляться с инфинитивом как с частицей - to так и без нее)
They made her stay at home.
They helped me (to) do the task.
после выражения – had better
You’d better do it.
после глаголов: hear, listen to, notice, see, watch, feel ( для описания завершенного действия)
I didn’t notice him enter the house.