The infinitive +ing, e.g. working, loving, sitting.
B. Use
1. To form the continuous tenses:
He is working. You've been dreaming.
2. As adjectives:
running water floating wreckage
dripping taps leaking pipes
Here there is equal stress on participle and noun.
3. Afterhave + object:
He had me swimming in a week.
We have people standing on our steps all day.
I won't have him cleaning his bike in the kitchen.
4. A present participle can sometimes replace a relative pronoun + verb:
a map that marks/marked political boundaries
= a map marking political boundaries people who wish/wished to visit the caves
= people wishing to visit the caves
children who need/needed medical attention
= children needing medical attention
5. Present participles/participle phrases such asadding/pointing out/ reminding/warning can introduce statements in indirect speech:
He told me to start early, reminding me that the roads
would be crowded.
6. After verbs of sensation (see 120)
7. Aftercatch/find/leave + object (see 121)
8. Aftergo, come, spend, waste, be busy (see 122)
9. Present participles can sometimes replace subject + verb in other main or subordinate clauses other than those mentioned above (see 123-4).
Present Participle after verbs of sensation
A. The basic verbs of sensationsee, hear, feel, smell, and the verbs listen (to), notice andwatch can be followed by object + present participle:
/ see him passing my house every day.
Didn 't you hear the clock striking?
She smelt something burning and saw smoke rising.
The action in the present participle may be either complete or incomplete: / saw him changing the wheel could mean that I watched the whole action or that I saw only part of it.
B. see, hear, feel and sometimeslisten (to), notice andwatch can also be followed by object + bare infinitive:
We saw him leave the house.
I heard him make arrangements for his journey.
The infinitive implies that the action is complete. / saw him change the wheel means that I saw the whole action.
C. Comparison of the two forms
The participle is the more generally useful as it can express both complete and incomplete actions. But the infinitive is useful when we want to emphasize that the action is complete. It is also neater than the participle when there is a succession of actions:
I saw him enter the room, unlock a drawer, take out a document, photograph it and put it back.
D. In the passive the full infinitive is used after verbs of the senses:
He was heard to say that the minister had been bribed.