1. verbs of perception: see, hear, feel, observe, watch, notice, behold, perceive, etc.
2. verb of causation: let, make, have, bid, help
3. idiomatic use: had better, had rather, would rather, had sooner
4. idiomatic use: cannot but
examples: John cannot (do anything) but (to) cry when he failed his exam.
2007-11-20 13:59:58 補充:
To: fuil8Please do not copy my answer. Thank you.