Grammar can concentrate on making up for mistakes, using grammar instruction books and exercise books to do systematic learning, and then constantly applying and consolidating in reading training. Of course, there will be a process of constantly forgetting this river and revisiting it. You can always keep an Oxford grammar handbook at hand, and then you should take the trouble to ask the teacher questions.

Words need to be memorized very hard, made sounds, read correctly, and then written silently, in order to remember spelling. Second, you must have an environment where you can use words to remember their parts of speech and usage, so memorizing words in combination with the text is the best way. If you fall behind a lot in middle school, it means that you don't remember a lot of basic vocabulary, so you can't just recite the words in the vocabulary of college English textbooks. Instead, you should find out all the words you can't learn in each text, list them, recite them by yourself, and ask your classmates and teachers if you don't understand them (don't be afraid of losing face if you want to learn something, or you will fail). This job is very tiring at first, and it takes a lot of time to do it every day. At the same time, insist on reading the text every day (including all the texts you have learned since you entered the university, and read them repeatedly). Because commonly used words will appear in the text constantly, as long as you can persist in reciting words and reading the text for 1.5-2 hours every day for about half a year, your mastery of commonly used words will be greatly improved. At that time, the learning difficulty of college English texts will be much reduced, the number of words you need to look up will be much reduced, and it will be easier to keep up with the teacher's explanation in class. When the time for memorizing words and reading texts can be reduced, expand reading after class, such as reading English newspapers and English web pages (don't be afraid of foreign web pages, you will know that there are not as many new words as you think). When you don't find it particularly difficult to learn grammar and words in the text, it means that your English level meets the requirements of the textbook. On this basis, ask your English teacher how to improve listening and writing faster.

Everything is difficult at the beginning, and it is difficult for older students to make up foreign languages. However, it depends on human efforts. As long as the motto of Hunan friends is "hard work, patience and bullying", it will certainly succeed.