Have to/Don’t have to

๐ŸŒธ Verb (ใชใ„-form) ใชใใฆใ‚‚ใ„ใ„ใงใ™
Verb (nai-form) nakutemo ii desu (remove nai and replace with nakutemo)
You don’t have to ~ (positive sentence, but negative meaning)

๐ŸŒธ Verb (ใชใ„-form) ใชใ‘ใ‚Œใฐใ„ใ‘ใพใ›ใ‚“
Verb (nai-form) nakereba ikemasen (remove nai and replace with nakereba)
You have to do ~ (negative sentence, but positive meaning)

ๆ—ฉใใŠใใชใ‘ใ‚Œใฐใ„ใ‘ใพใ›ใ‚“ใ€‚
hayaku okinakereba ikemasen
You have to get up early.

ๆ—ฉใ่ตทใใชใใฆใ‚‚ใ„ใ„ใงใ™ใ€‚
hayaku okinakutemo ii desu
You don’t have to get up early.

ๅ‹‰ๅผทใ—ใชใ‘ใ‚Œใฐใ„ใ‘ใพใ›ใ‚“
benkyou shinakereba ikemasen
You have to study.

ๅ‹‰ๅผทใ—ใชใใฆใ‚‚ใ„ใ„ใงใ™
benkyou shinakutemo ii desu
You don’t have to study.

ๅฎฟ้กŒใ‚’ใ—ใชใ‘ใ‚Œใฐใ„ใ‘ใพใ›ใ‚“ใ€‚
shukudai o shinakereba ikemasen
You have to do homework.

ๅฎฟ้กŒใ‚’ใ—ใชใใฆใ‚‚ใ„ใ„ใงใ™ใ€‚
shukudai o shinakutemo ii desu
You don’t have to do homework.

๐ŸŒธ Used as a Question

ๆผขๅญ—ใงๆ›ธใ‹ใชใ‘ใ‚Œใฐใ„ใ‹ใชใ„ใ‹๏ผŸ
kanji de kakanakereba ikanai ka
Do I have to write in Kanji?

ใฏใ„ใ€(ๆผขๅญ—ใงๆ›ธใ‹)ใชใ‘ใ‚Œใฐใ„ใ‹ใชใ„ใ€‚
hai, (kanji de kaka)nakereba ikanai
Yes, you have to write in Kanji.

ใ„ใ„ใˆใ€(ๆผขๅญ—ใงๆ›ธใ‹)ใชใใฆใ‚‚ใ„ใ„ใงใ™ใ€‚
iie, (kanji de kaka)nakutemo ii desu
No, you don’t have to write in Kanji.

ๆผขๅญ—ใงๆ›ธใ‹ใชใใฆใ‚‚ใ„ใ„ใงใ™ใ‹ใ€‚
kanji de kakanakutemo ii desu ka
Don’t I have to write in Kanji?

ใฏใ„ใ€(ๆผขๅญ—ใงๆ›ธใ‹)ใชใใฆใ‚‚ใ„ใ„ใงใ™ใ€‚
hai, (kanji de kaka)nakutemo ii desu
Yes, you don’t have to write in Kanji.

ใ„ใ„ใˆใ€(ๆผขๅญ—ใงๆ›ธใ‹)ใชใ‘ใ‚Œใฐใ„ใ‹ใชใ„ใ€‚
iie, (kanji de kaka)nakereba ikanai
No, you have to write in Kanji.

๐ŸŒธ When answering to Boss/Customers use:
Verb (ใฆ-form) ใใ ใ•ใ„
Verb (te-form) kudasai

๐ŸŒธ Difference between ใชใ‘ใ‚Œใฐใ„ใ‘ใพใ›ใ‚“ and ใชใ‘ใ‚Œใฐใชใ‚Šใพใ›ใ‚“

Verb (ใชใ„-form) ใชใ‘ใ‚Œใฐใ„ใ‘ใพใ›ใ‚“
Verb (nai-form) nakereba ikemasen
You have to do ~

Verb (ใชใ„-form) ใชใ‘ใ‚Œใฐใชใ‚Šใพใ›ใ‚“
Verb (nai-form) nakereba narimasen
You have to do ~

For ๏ฝžใชใ‘ใ‚Œใฐใ„ใ‘ใพใ›ใ‚“ (~nakereba ikemasen) – You have to do something and you want to do it.

For ๏ฝžใชใ‘ใ‚Œใฐใชใ‚Šใพใ›ใ‚“ (~nakereba narimasen) – You have to do something but you don’t want to do it. Used when you want to make an excuse.

ใ™ใฟใพใ›ใ‚“ใ€‚ๆ˜Žๆ—ฅใฏ่ฉฆ้จ“ใ ใ‹ใ‚‰ใ€ไปŠๆ™ฉๅ‹‰ๅผทใ—ใชใ‘ใ‚Œใฐใชใ‚Šใพใ›ใ‚“ใ€‚
sumimasen. ashita wa shiken da kara, konban benkyou shinakereba narimasen
I am sorry. There is an exam tomorrow, so I have to study tonight.