形容词副词比较级构词法，动词过去式过去分词构词法，现在完成时构词法各举5例。请会的尽快回答，谢谢！

形容词比较级动词过去式现在完成时
taller smiled have left
finer helped have had
bigger stopped have seen
easier visited has written
more careful preferred has been

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