This lesson is a review and summary of the various types of present tense structures in the Korean language. 1. Basic Present Tense with "-아/어/여" (Level 1 Lesson 16)Verb stem + -아/어/여 + -요Ex) 사다 = to buy → 사 + -아요 = 사요 = I buy it. / She buys it. / They buy it. / Buy it. 주다 = to give→ 주 + -어요 = 줘요 = I give it (to someone). / They give it (to someone). / Give it to me. 저는 매일 운동해요.= I exercise every day.저는 한국어를 혼자서 공부해요.= I study Korean by myself.2. -시 + -어요 (Level 5 Lesson 2)The suffix -시 is used to make the sentence honorific when you are talking to or about someone you want to show respect for. Verb stem + -시 + -어요 → -세요 Ex)가다 = to go→ 가 + -시 + -어요 = 가셔요 = 가세요 = He goes. / She goes. / Please go. 모르다 = to not know→ 모르 + -시 + -어요 = 모르셔요 = 모르세요 = He doesn’t know. / She doesn’t know. 3. -고 있다 (Level 2 Lesson 10)-고 있다 is used after verb stems to form present progressive sentences. Then again 있다 is conjugated to match the context or the intended tense of the sentence.Ex)공부하다 = to study→ 공부하 + -고 있다 = 공부하고 있어요 = I am studying. / They are studying.지금 뭐 하고 있어요? = What are you doing now?서점에 가고 있어요.= I am going to the library.4. -고 싶다 (Level 1 Lesson 13)-고 싶다 is used to express “I want to”. Ex) 보다 = to see→ 보 + 고 싶다 = 보고 싶어요 = I want to see. / I miss you.뭐 하고 싶어요?= What do you want to do?밖에 나가고 싶어요.= I want to go outside.5. -(으)ㄹ 수 있다 (Level 2 Lesson 17)-(으)ㄹ 수 있다 is used to express “can” or “be able to”.Ex)찾다 = to look for, to find→ 찾 + -(으)ㄹ 수 있다 = 찾을 수 있어요 = I can look for it. / I can find it.여기 주차할 수 있어요? = Can I park here?이거 읽을 수 있어요?= Can you read this? 6. -아/어/여야 되다 (Level 2 Lesson 20)You can use the -아/어/여야 되다 ending to express “have to”, “should” or “must”.Ex)가다 = to go→ 가 + -아야 되다 = 가야 되다 = 가야 돼요 = I have to go.이거 먼저 해야 돼요.= I need to do this first.조심해야 돼요.= You have to be careful.7. -지 않다, 안 (Level 1 Lesson 21)You can form negative sentences by adding -지 않다 after the verb stem or 안 before the verb. Ex)이상하다 = to be strange→ 이상하 + -지 않다 = 이상하지 않아요 = It’s not strange.→ 안 + 이상하다 = 안 이상해요 = It’s not strange.이거 안 비싸요.= This is not expensive.그거 별로 안 좋아요.= It’s not that good.8. -지 마세요 (Level 2 Lesson 30)-지 마세요 is used after verb stems to tell someone not to do something.Ex)먹다 = to eat→ 먹 + -지 마세요 = 먹지 마세요 = Don’t eat it.걱정하지 마세요.= Don’t worry.늦지 마세요.= Don’t be late.9. -아/어/여요 (Let’s) (Level 3 Lesson 16)-아/어/여요 looks the same as the plain present tense, but it can be used to form “Let’s” sentences as well. Ex)하다 = to do→ 하 + -여요 = 해요 = Let’s do it.같이 해요.= Let’s do it.지금 가요.= Let’s go now.10. -(으)ㄴ 것 같다 (Level 4 Lesson 27)같다 originally means “to be the same” or “to seem like” but when expressing your opinion about something, you can use -(으)ㄴ 것 같다 to say “I think …”. Ex)좋다 = to be good→ 좋 + -은 것 같다 = 좋은 것 같아요 = I think it’s good.이상한 것 같아요.= I think it’s strange.그 사람 착한 것 같아요.= I think he’s a nice person.11. -(으)ㄹ 수도 있다 (Level 3 Lesson 22)When you want to say that something “might” or “could” happen, you can use the structure -(으)ㄹ 수도 있다. Ex) 늦다 = to be late→ 늦 + -(으)ㄹ 수도 있다 = 늦을 수도 있어요 = I might be late. / They might be late.석진 씨가 알 수도 있어요.= Seokjin might know.오늘 집에 있을 수도 있어요.= I might stay at home today.