Happy to have a chat with you if you have specific questions. In the first instance it looks like this child really does need a full assessment so that you can work out where the priorities lie and have information about her comprehension vs expression. Could you borrow or rent an assessment from a fellow SLT colleague e.g. from your ASLTIP local group?.
By the few examples given I would expect that she would benefit from working on sentence structure: I prefer Shape coding to colourful semantics, but either could work. It also looks as if perhaps she might need help with prepositions.
Good luck and enjoy! It can be so rewarding working with these children!