She looked at him as if she (saw) a ghost.

• সঠিক উত্তর হবে - She looked at him as if she had seen a ghost.

• Past Indefinite + as if/as though + Past Perfect.
- As if / as though এর পূর্বে Past indefinite tense থাকলে as if / as though এর পরে past perfect হয়।
- Example: He told the matter as if he had known it.

• Present + as if/as though + Past Indefinite
- As if / as though এর পূর্বে present indefinite tense থাকলে as if / as though এর পরে past indefinite।
- Example: She behaves as though he owned the house.

• আর as if/as though + Past Indefinite এ ‘be’ verb আসলে তা সব সময় were হবে।
- Example: Akash behaves as though he were mad.