had better
would rather
would sooner
would just as soon
might (just) as well
cannot but
cannot choose but
cannot help but
例句
a. I cannot but admire his courage.
b. We might as well put up here for tonight.
c. It all started so innocently that warm June night. When I first met you,you looked so beautiful and lovely that I couldn’t help but fall in love with you, even though we both agreed our worlds were far apart, and could never be one.