English, like all languages, is full of problems for the foreign learner. Some of these points are easy to explain – for instance, the formation of questions, the difference between since and for, the meaning of after all. Other problems are more tricky, and cause difficulty even for advanced students and teachers. How exactly is the present perfect used? When do we use past tenses to be polite? What are the differences between at, on and in with expressions of place? We can say a chair leg – why not *a cat leg? When can we use the expression do so? When is the used with superlatives? Is unless the same as if not? What are the differences between come and go, between each and every, between big, large and great, between fairly, quite, rather and pretty? Is it correct to say There’s three more bottles in the fridge? How do you actually say 3 x 4 = 12? And so on, and so on.
Ingliz-tili.uz is a guide to problems of this kind.