I need an English expert

[http://dummy.us.eu.org/robert (Robert)]

So, here's my problem.

The object of these sentences are actions, as far as I can tell:

 * I watch birds fly
 * I see dogs run
 * I feel the earth shake
 * I have the machine compute
 * I hear the kids play

These are present tense sentences where the object is also a present tense
action.

Also, turning these into past tense leaves the present tense intact.

 * I watched birds fly
 * I saw dogs run
 * I felt the earth shake
 * I had the machine compute
 * I heard the kids play

My question is, why are these being and sensing verbs the only (as far as
I know) verbs that have this property?  Other verbs require an infinitive
for the object actions or a verb followed by a conjunction.

 * I acknowledge the tides turning
 * I know that the keyboard sucks