“Home”, “Abroad” as adverbs
Incorrect: He went to home yesterday.
Correct : He went home yesterday.
Incorrect : I went to abroad several times.
Correct : I went abroad several times.
Note: Some words like "home” and "abroad” are used directly as adverbs. Therefore, no preposition is necessary before them.
Similarly, we can also say:
We live upstairs/downstairs.
He drove uptown/downtown.
But look at the following two sentences:
Incorrect : He came my home.
Correct : He came to my home.
Here ‘my home’ is a noun phrase which cannot be used as an adverbial without a preposition before it.