But

๐ŸŒธ ใ‘ใ‚Œใฉใ‚‚ (keredomo) and ใŒ (ga)  – used as a conjunction – formal

ใŒใฃใ“ใ†ใซ่กŒใใพใ—ใŸใ‘ใ‚Œใฉใ‚‚ใ€ๅ…ˆ็”Ÿใฏใ„ใพใ›ใ‚“ใงใ—ใŸ
gakkou ni ikimashita keredomo, sensei wa imasen deshita.
I went to school, but the teacher wasnโ€™t there.

ใใฎๆœฌใ‚’่ชญใฟใพใ—ใŸใŒใ™ใใงใฏใ‚ใ‚Šใพใ›ใ‚“ใงใ—ใŸ
sono hon o yomimashita ga suki dewa arimasen deshita
I read that book, but I didnโ€™t like it.

ใ‚ใ‚ใŒใตใฃใฆใ„ใ‚‹ใ‘ใ‚Œใฉใ‚‚ใ€ใฟใ›ใซใ„ใใพใ™ใ€‚
ame ga futteiru keredomo, mise ni ikimasu.
Itโ€™s raining, but I will go to the store.

ใใจใฏใ‚ใคใ„ใ‘ใ‚Œใฉใ€ใ„ใˆใฎใชใ‹ใฏใ™ใšใ—ใ„ใ€‚
soto wa atsui keredo, ie no naka wa suzushii.
Outside is hot, but inside the house is cool.

ใซใปใ‚“ใ”ใ‚’ในใ‚“ใใ‚‡ใ†ใ—ใพใ—ใŸใŒใ€ใ‚ใ‹ใ‚Šใพใ›ใ‚“ใ€‚
nihongo o benkyou shimashita ga, wakarimasen.
I studied Japanese, but I donโ€™t understand it.

๐ŸŒธ ใ‘ใฉ (kedo) – casual

ใใฎๆœฌใ‚’่ชญใฟใพใ—ใŸใ‘ใฉใ™ใใงใฏใ‚ใ‚Šใพใ›ใ‚“ใงใ—ใŸ
sono hon o yomimashita kedo suki dewa arimasen deshita
I read that book, but I didnโ€™t like it.

ใ™ใ“ใ—ใฏใ‚„ใ„ใ‘ใฉใ€ใŠใŸใ‚“ใ˜ใ‚‡ใ†ใณใŠใ‚ใงใจใ†๏ผ
Sukoshi hayai kedo, o-tanjoubi omedetou!
It is a little early but Happy Birthday!

โ— ใ‘ใฉ (kedo) can also be used as a statement softener.

ใ‘ใ„ใ“ใงใ™ใ‘ใฉใ€‚
Keiko desu kedo.
This is Keiko.

ใ™ใ—ใŒใ™ใ?
sushi ga suki
Do you like sushi?

ใฏใ„ใ€ๅฅฝใ™ใใงใ™ใ‘ใฉใ€‚
hai, suki desu kedo.
Yes, I like it.

๐ŸŒธ ใงใ‚‚ (demo) – used at the start of sentence / casual

ใใ‚‡ใ†ใ‚ใฏใ„ใใŒใ—ใ„ใงใ™ใ€‚ใงใ‚‚ใ‚ใ—ใŸใฏใฒใพใงใ™ใ€‚
kyou wa isogashii desu. Demo ashita wa hima desu.
I’m busy today. But tomorrow I’m free.

ๆฏใฏ็งใซๅŽณใ—ใ„ใ€‚ใงใ‚‚ๅผŸใซใฏๅ„ชใ—ใ„ใ€‚
Haaha wa watashi ni kibishii. Demo otouto niwa yasashii .
My mom is strict with me. But she is sweet to my little brother.

โ— Same usage with ใงใ‚‚ (demo), but ใ—ใ‹ใ— (shikashi) & ใ ใŒ (daga) is used more in writing.

ใ‚คใƒณใ‚ฟใƒผใƒใƒƒใƒˆใฏๆƒ…ๅ ฑใ‚’้›†ใ‚ใ‚‹ใฎใซใจใฆใ‚‚ไพฟๅˆฉใ ใ€‚ใ—ใ‹ใ—ใƒใƒƒใƒˆไธŠใฎๅ…จใฆใฎๆƒ…ๅ ฑใŒๆญฃใ—ใ„ใจใฏ้™ใ‚‰ใชใ„ใ€‚
Intaanetto wa jouhou wo atsumeru noni totemo benrida. Shikashi netto jou no subete no jouhou ga tadashii to wa kagiranai.
Internet is very convenient for gathering information. However, the information on the internet is not always correct.