Learn Danish: Vi går til stranden sammen med hunden. - We are walking to the beach together with the dog.

Danish doesn't have a continuous tense like the "-ing" form in English. The simple present tense word går translates to both "walk" and "are walking". You should never try to translate "are walking" word-for-word as "er går".

Where is the word for "the" in this sentence?

In Danish, "the" usually isn't a separate word that comes before the noun. Instead, it gets attached to the end of the word as a suffix. Strand (beach) becomes stranden (the beach), and hund (dog) becomes hunden (the dog).

Does "går" just mean "go"? Could we be driving to the beach?

No, går specifically means to walk on foot. While English uses "go" broadly for almost any type of travel, Danish requires you to be specific about how you are moving. If you were driving to the beach, you would use kører, and if you were cycling, you would use cykler.

Could you just say "med hunden" instead of "sammen med hunden"?

Yes, you could just say med hunden (with the dog) and it would be grammatically correct. However, adding sammen (together) to create the phrase sammen med is extremely common in Danish when you want to emphasize companionship and doing an activity together with a person or a pet.