Choose the correct sentence :

Right Answer: He broke her heart by turning down her proposal.

The verb 'break' is an irregular verb and its three forms are break, broke and broken. Its simple past tense is therefore 'broke', not the regular form 'breaked', which does not exist in English. The sentence describes a completed past action of turning down a proposal, so the simple past is required and the sentence reads 'He broke her heart by turning down her proposal'. Options two and three use the invented form 'breaked', and option one wrongly uses the present tense. Hence the fourth sentence is correct.