Infinitive
phrases starts with infinitives that is, “to” added by a simple verb and can be
used as nouns, adjectives or adverbs. In the case of including a main clause in
the sentence, infinitive phrase separates it with comma.
In
the sentence:
Because she had never baked a cake before, Sharon decided to follow the
recipe carefully.
A main clause is put first ‘Because she had never baked a cake before’
then a comma is added, so that means the infinitive phrase is ‘d. to follow the
recipe carefully’.