Can anybody explain the meaning of these sentences?
- He has started taking antidepressants.
- He has been taking antidepressants.
- He has taken antidepressants.
- He took antidepressants.
He has started taking antidepressants.
It'll be used in the case when
he has recently started the process of taking those antidepressants.
He has been taking antidepressants.
It'll be used to signify that a significant time has passed since
he started taking the antidepressants.
He has taken antidepressants.
This and the first one are similar in context of time-frame. But this will just mean that
he has taken the antidepressants for a particular time while the first one will mean that
he either has a habit of taking antidepressants or
he has been prescribed for it.
He took antidepressants.
Similar to the previous one. The tense here is past, where as in the has taken case, it was past-participle.