英语初中没学好高中怎么办

If you didn't study Engpsh well in junior high and now find yourself in high school, you can:

Seek extra help from a teacher or tutor
Practice speaking, reading, and writing in Engpsh as much as possible
Immerse yourself in Engpsh by watching movies, reading books, and speaking with native speakers
Study grammar and vocabulary consistently and regularly
Find onpne resources and materials to supplement your learning.