A has
B has been
C have
D have been
A base
B based
C to base
D are based
A it
B its
C their
D them
A besides
B during
C towards
D with
A create
B created
C creation
D creative
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不怕辛苦的,苦一陣子;怕辛苦的,苦一輩子
That's not all.(還不止這些呢?)