摘要：This study aims at investigating the role of output and the relative efficacy of two different kinds of output tasks (reconstruction task and picture-cued writing task) in comprehending of two English target forms namely called past counterfactual conditional and English passive form. One hundred Iranian EFL learners participated in the experiment. In terms of target forms comprehension, the results showed that the participants who received output opportunities during the treatment performed significantly on the immediate post test and delayed post test. In terms of the individual effect of each type of output task type, the results also revealed that both groups improved significantly after the instructional treatment in the comprehension of the target grammatical features and the effects lasted one month.
关键词：output;text reconstruction;picture cued writing task;English past counterfactual conditional
