Look at the sentence that follows.  when translated to spanish, would it use the subjunctive? martha eats eggs every morning for breakfast. no. yes.

No.

you use the subjunctive the talking about things that aren't facts or certain, like emotions, suggestions, doubt, etc.

for example, if i were to say "yo pienso que tu debas estudiar" (i think that you should study), just because i think you SHOULD study doesn't mean that you actually will, thus making it subjunctive 

Hope this helps :)