... work – not the teacher If you let someone something, you allow it or give permission If you allow someone to something, you let them something or give permission If you make someone something, ... ‘change’ Note: we talk about someone or something having an effect on something or someone If we use effect as a verb, it means to ‘carry out’ or to ‘cause something to happen’, but it is used only ... are often confused, Kisy If somebody or something is efficient, then he, she or it works in a well-organised way, without wasting time or energy If something is effective, it works well and produces...