English sentences with relative clauses and the passive voice have long confused students when they translate from English to Chinese. In this study, a learner corpus was developed and incorporated into teaching by examining the linguistic features of relative clauses and passive voice in student translations. Students' translated sentences were analyzed using WordSmith to calculate, categorize, and annotate the common linguistic features in students' translations of English sentences that contained relative clauses and passive voice. The research findings can be used to guide students to practice translation strategies that are unfamiliar to them and enhance their ability to apply various strategies. The results can thus be used to increase students' linguistic sensitivity and reduce translation errors, thereby improving learners' ability to do translation with greater accuracy.