He goes to school on foot.

Correction: In fact, to get a sentence, we must first make clear the subject and predicate. Let's look at this sentence, obviously signs is the subject, Say is the predicate, and say is followed by an object clause that omits that; Now let's look at "You shouldn't go on? The grass in the garden and the flowers picked. " The subject in the clause is you, and pick is obviously a predicate juxtaposed with walk. Ignore what you shouldn't do before choosing here? And should be changed to or according to the meaning of the sentence.

The slogan says don't trample on the lawn or pick flowers in the garden.