He acted ______ he had been mad.

• সঠিক বাক্যটি হচ্ছে - He acted as if he had been mad.

1) Present + as if + Past Indefinite
- অর্থাৎ, as if এর পূর্বে present indefinite tense থাকলে as if এর পরে past indefinite হয় এবং be verb থাকলে সবসময় were হয়।
- Ex: He acts as if he were mad.
- বাক্যে as if , as though , wish এর পর to be verb আসলে তা সব সময় were হয়।

• আবার,
2) Past + as if + Past Perfect
- অর্থাৎ,As if / as though এর পূর্বে Past indefinite tense থাকলে As if / as though এর পরে past perfect হয়।
- Ex: He acted as if he had been mad.