1. It is not a matter of grammatic but sematic…maybe… 应该不是错,只是意思有可能不一样…
2. First, they are shy and afraid to expose their English grammatic errors. 首先,他们害怕害羞暴露他们的英语错误。
3. You are allowed to revise your essay before the week ends. You are very welcome to correct any grammatic error. The best essay will be announced on Sunday! 在星期末端之前,您被允许校正您的英语争论文。您是被允改正您的论文的语法错误。最佳的英语争论文将在周末星期天宣布!