如果是填空题I___tree yesterday,该选 planted 因为有明确的时间yesterday (昨天)要填动词的过去时;
i have planted tree yesterday 这句话是错的.have planted 是现在完成时,不可有yesterday.
i have planted tree.我种了三棵树.强调现在的“结果”,用现在完成时
而i planted tree yesterday ,我昨天种了树.强调昨天的“动作”,用过去时.
如果是填空题I___tree yesterday,该选 planted 因为有明确的时间yesterday (昨天)要填动词的过去时;
i have planted tree yesterday 这句话是错的.have planted 是现在完成时,不可有yesterday.
i have planted tree.我种了三棵树.强调现在的“结果”,用现在完成时
而i planted tree yesterday ,我昨天种了树.强调昨天的“动作”,用过去时.