【正文】
unnecessary (3) it is +a +名詞+ to do... It is a pity / a pleasure / a pleasant thing / ones duty / an honor / a shame / a crime / no easy job to do It takes (sb.) some time / courage / patience to do It requires courage / patience / hard work to do *注意: probable 和 possible 均可作表語,但possible可以用不定式作真實主語, 而probable不能用不定式作真實主語。因此在句中可以做主語、表語、賓語、賓語補足語、定語和狀語。 It is probable for him to e to the meetin