1. Perhaps/Maybe (ஒருவேளை)
These two words are used for saying that you are not certain about something, or that something may or may not be true.
'Perhaps' is more formal and is used in writing while 'maybe' is used more in spoken English.
E. g. I wondered if perhaps he had changed his mind about attending the party.
2. Probably/Possibly (அநேகமாக) – these two words can confuse even native speakers
'probably' is used for saying that something is likely to be true, and possibly that it may be true but you are not certain.
E. g. If house prices are low, it's probably because there is a lack of demand.
3. Apparently (வெளிப்படையாக)
It is used when what you are saying is based on what you have heard, not on what you know is true and therefore fact.
E. g. Apparently, she resigned because she had an argument with her boss.
4. Not to my knowledge (எனக்குத் தெரிந்த வரையில்)
This is used for saying that you think something is not true, although you are not completely certain.
E. g. 'Has the report been sent yet?'
'Not to my knowledge. '
5. I imagine/suppose/guess (நான் நிணைக்கிறேன்)
These are used when you think something is probably true, but you can't be sure. "Guess" is more frequently used in American English, although you can hear it in British English, too.
"Suppose" is more characteristic of British English and is often used in the negative.
E. g. I imagine they've already left for the airport.
E. g. I don’t suppose you'd consider staying for another week?
E. g. I guess he will want to meet all the team members before the conference.
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