Can words and grammar be learned at the same time?

Can be done simultaneously. Although it is more difficult to take the postgraduate entrance examination for English, don't feel that you gave up without passing CET-4. If the foundation is poor, you can consider enrolling in classes, such as all-English classes for postgraduate entrance examination, starting with word grammar. It is necessary to sort out the differences between English for postgraduate entrance examination and CET-4 and CET-6 in advance, such as one English translated into Chinese and one Chinese translated into English. Then, after listening to the English course for postgraduate entrance examination, we should learn to sum up and think reversely, concentrate on doing the real questions of Band 4 and adapt to the questions of Band 4 in advance. One-stop study abroad strategy in ing.com