I really want to know about the relation between dummy "it" and the the verb "make".
These example sentences are from TOEFL, and I collected all of them which includes dummy "it" after the verb "make".
- A well-kept room making it possible for people to concentrate effectively on their work.
- Orderly environment makes it easier to process the information, which ensures that tasks are completed more efficiently.
- The rise in demand for domestic goods causes local companies to increase production, which makes it necessary to hire more workers.
- It is the lack or gravity on the moon that makes it possible to leap 30feet or more.
- More and more people are making changes to their lifestyle that are beneficial to the environment.
When I googled about the dummy it after the verb make, it said that it has to be the subject of an infinitive phrase.
However, according to the Cambridge Dictionary, https://dictionary.cambridge.org/grammar/british-grammar/infinitives-and-imperatives/infinitives-with-and-without-to,
it is written that we can use the to infinitive in a clause with a verb that has no subject.
Moreover, example number 5, the sentence is grammatical even if verb make is used without dummy it.
now I am in panic...
Several days I have looked up dictionary and google, but I do not get the right answer..
please help me to understand the syntactic structure regarding make and dummy it with infinitive clause.