Take the verb stem and add either ㄹ 수 없다 or 을 수 없다. If the verb stem ends in a vowel then add ㄹ 수 있다 and if it ends in a consonant then add 을 수 있다. :) I'll give you some examples on how to say "I can't do ___". To say "I can't stop", then add 그치 in front of the sentence. :D Feel free to message me if you have any questions. :) Examples: 잘 수 없다= I can't sleep. 볼 수 없다= I can't see. 먹을 수 없다= I can't eat. Hope I helped! :)

I'm assuming you mean the spider? The spider is called 장님거미. Hope I helped. :)

떫다 Means sour and 씁쓸 맛 means bitter tasting. :) Hope I helped! :)

가끔 Is sometimes 때로 is once in a while or sometimes. Examples: 가끔 헷갈립니다=Sometimes I get confused. 때로는 선의의 거짓말도 필요하다= White lies are necessary once in a while. Hope I helped. :)

Help you with what?

Ahh, what you're hearing is actually "저기요!". If you look on some online dictionaries, they will probably tell you it means "hey!". 저기요 is used when trying to get someones attention. For example, If you're locked in a room, you'd yell "저기요!!!!!". Where as 실례합니다 is used when you've done something wrong, like barging into someones room while they're in it, or listening in on a conversation. And the third is 잠시만요, you use this when actually excusing yourself from something, for example, excusing yourself from the dinner table. :) Hope I helped!

Yes, you can use 주로. :) 주로 Means mainly and 대개 means usually. As you may know, mainly and usually have different meanings. Mainly means more than anything or for the most part, and usually means something you generally or normally do. :) Hope I helped!!!!! :D

Yes, 통화하다 means to talk on the phone. 전화하다 is to call a number and 전화를 걸다 is to make a call or dial.