What kind of phonetic symbols and grammar can be taught in English in the third and fourth grades of primary school?

The pronunciation of some letter combinations can be taught in the lower grades of primary schools, such as ow combination, ou combination and so on, which is more practical for primary school students. The phonetic symbols of the teaching system are easily confused.

For grammar, start with simple sentence patterns, and cultivate a sense of language first. Teach some simple grammar concepts, such as be verbs and so on.