I have been working as physiotherapist at AKTH for 4 years
Main verb phrase: have been studying
Analysis:
Tense: Present
Aspect: Perfect Progressive (also called Perfect Continuous)
Mood: Indicative (used to state a fact)
Tense: Present
Word(s) indicating tense: have
Aspect: Perfect Progressive (Perfect Continuous)
Word(s) indicating aspect: have been (perfect) + -ing form working (progressive)
Mood: Indicative
Word(s) indicating mood: The sentence structure (not a specific word)