Everyone says that he is difficult to ___,but I don't...
Did you study German? 你们学过德语吗?2)do + not 构成否定句,例如:I do not want to be criticized.我不想挨批评。He doesn't like to study.他不想学习。In the past, many students did not know the importance of English.过去,好多学生不知道英语的重要性。3) 构成否定祈使句,例如:Don't go ...