Source:Manhattan SC guide
To free my leg,I lifted the weight.
Infinitive of purpose can be used with unnamed agents in Passive-Voice sentences.The weight was lifted to free my legJust make sure that whoever doesthe lifting intends to free my legAn infinitive of purpose needs to indicate the purpose of someone.
The boulder rolled to free my leg implies nonsensically that the boulder wanted to free my leg.
I dont understand the concept around the boulder sentence.I mean,how do we look at intent here?How can we be for sure that the boulder moved to free his leg?It could be an automatic boulder too right?I have a little doubt over the Infinitives of Purpose concept.
One more thing sir,Is it necessary to byheart Idioms in the SC guide?Can I do well on SC without studying them?
Thanks
Dan