Sense Verbs are watch, hear, see, listen to, smell, taste. sense.
Sense Verbs can be followed by Object + ing / inifitive.
Example)
Hear - I heard the plane landing.
Feel - I felt my hands shaking.
Listen - I listened to the rain falling all night.
See - I saw Bill running for the bus.
Smell - I smelled the food cooking.
Sense - I sensed the end coming.
Watch - I watched him working.
* Taste is not commonly used in this construction, but it is possible as in this example.
I tasted the chocholate running down the side of my mouth.
- Compare
I saw her write the report. (I saw her writing the report./ I saw the whole action.)
I saw her writing the report. (When I saw her, she was writing the report. We don't know if the speaker kept watcing until the report was finished. The writer probably continued after the speaker stopped watching.)