The correct phrase depends on the context. Both "since yesterday" and "from yesterday" are grammatically correct, but they convey different meanings.
"Since Yesterday"
"Since yesterday" refers to a period of time that began yesterday and continues until the present moment. It emphasizes the duration of an event or action.
Examples:
- "I haven't seen him since yesterday." This implies that the speaker last saw the person yesterday and hasn't seen them since then.
- "It's been raining since yesterday." This means the rain started yesterday and is still ongoing.
"From Yesterday"
"From yesterday" indicates a starting point in time. It refers to something that began yesterday and may or may not be ongoing. It emphasizes the beginning of an event or action.
Examples:
- "The sale started from yesterday." This means the sale began yesterday, but it doesn't necessarily imply it's still ongoing.
- "I've been working from yesterday." This indicates that the speaker started working yesterday and may or may not still be working.
Conclusion
The choice between "since yesterday" and "from yesterday" depends on whether you want to emphasize the duration of an event or its starting point.
