Use 'cover in' when something is physically applied onto another object's surface.

Physical Application

'Cover in' does not always mean complete coverage, it can be partial too.

Partial Coverage

Using 'cover in' often suggests a noticeable visual change to the covered item.

Think of 'cover in' as adding a layer that changes the item's appearance or function.

Often used to describe natural occurrences, like weather or seasons.

Use 'cover in' when temporarily taking over someone's duties or responsibilities.

'Cover in' is often used in work or professional contexts.

Implies a short-term commitment to someone's tasks, not a permanent replacement.