A strong vocabulary is an important cornerstone of learning English well. I want to make up for primary school English in the following ways:
Read the text carefully. Find a sense of language and master knowledge points on the basis of familiarity with reading. If possible, it is helpful to distinguish sentence elements in junior middle school English.
Recite words. Understand the part of speech of words. Stick to it day after day, believe me, the accumulation of words is beneficial and harmless.
Generally speaking, it is enough to master the above two points in primary school English. If you want to go further, you can choose some commonly used words from known words to master grammar. The simplest and most practical way to master grammar is to apply it to sentences.
I hope it helps.