
A good practice activity for syntax is mixing up words and having students put them in order. The new sentence should be grammatically correct. The semantics part comes into play when the student has to also make sure the sentence they've created makes logical sense.
An example is the following out of order sentence: Katie fast runs.

I have created a worksheet packet to practice these skills, which can be found at my Teachers Pay Teachers store: SpeechWise or you can create your own using the sample I have shown. Enjoy and Happy Teaching!