I am currently writing an assignment on the learners' I have in my class. My students have a problem with the Perfect Tense e.g. 'I lived in the uk since ten years' instead of 'I have lived'. I recognise that for some they have directly translated this from there language such as spanish as they would say it in this way, but most of my learners' are from Pakistan and India. Does anyone know if the Perfect Tense exists in these languages or whether they are directly translating to make this mistake. I need to provide evidence from their backgroounds that make the Perfect Tense a hard thing for the to grasp.