To complete the sentence 'Had I been there, ---', we have to use:
'Had I been there' (Past Perfect এর ইনভার্সন) থাকায় main clause এ 'I would have supported him' (would + have + past participle) বসবে।
Related Questions
'I would have lent' (main clause) থাকায় 'if' clause এ Past Perfect 'had asked' বসবে।
'he would have received' (main clause) থাকায় 'if' clause এ Past Perfect 'had revised' বসবে।
'he would have avoided' (main clause) থাকায় 'if' clause এ Past Perfect 'had thought' (had) বসবে।
'if' clause Present Simple এ থাকলে main clause ও Present Simple এ হয়। 'freezes' সঠিক রূপ।
'if I had hurried' (Past Perfect) থাকায় main clause এ 'could have caught' (could + have + past participle) বসবে।
জব সলুশন
