You can leave out "topics" depending on contexts, but not for "topic markers". When you decided to stick to "topics" in a sentence, you should put "topic markers" right after "topics". For example, 나는 로티 차나이를 먹고 있습니다.(saya tengah makan roti canai) In here, you can leave out "나는" only if it's very clear who's eating roti canai, but you CAN'T omit "는(a topic marker)" because it doesn't make any sense at all. A : 지금 뭐하세요?(awak buat apa sekarang?) B : 로티 차나이를 먹고 있습니다.(O) ("나는" is left out because it's very clear) 나( ) 로티 차나이를 먹고 있습니다.(X) (jangan lupa "a topic marker")

oh.너무감사하니다.now all clear.wahhh....my head now can move forward.thanks again

Nice thinking. Several months ago, I also tried to think topic and subject markers as 'the' and 'a(n)', and draw a couple of diagrams...it didn't make much sense, unfortunately. Those markers are different from the English articles. The topic marker is like 'as for' / 'talking of' / 'as opposed to others' / 'at least'.

about that.i figure out something about it.this topic marker here is same like "the" and "a".i mean "the" is use for one thing that maybe the only one exist like "the sun".while "a" is use for one thing(in the same time there are another thing just like it exist).am i right?my mind always crazy so i thought a lot of thing.hahaha

Hi, Gumiho. I know topic markers are such a pain in the neck - I'd like you to have some patience and give it a little time. ;) If you don't use any topic marker all the time, you could get yourself in trouble. Don't worry too much about it, we'll help you out.