Learn Dutch: Er zijn twee winkels op de hoek. - There are two shops on the corner.

Yes, you can! If you start the sentence with the location (Op de hoek), the verb zijn must stay in the second position. This pushes the word er to the third spot.

Why does winkel become winkels and not winkelen in the plural?

In Dutch, nouns that end in unstressed syllables like -el, -em, -en, and -er almost always take an -s to become plural. Since winkel ends in -el, it becomes winkels.

Is op de hoek a fixed phrase?

Yes! Just like in English, you say that something is 'on' the corner. You will use op de hoek very often when giving or receiving street directions in Dutch.