2

These factors can be something about the person or something about the situation, which can combine [to determine] the consumer's motivation [to process] product-related information at a given point in time.

I think the first infinitive clause to determine the consumer's motivation serves as a purpose adjunct.

But I am not sure about the second infinitive clause,
to process product-related information at a given point in time.

Does it also serve as a purpose adjunct ?
Or is it adjectival and add information to the consumer's motivation, telling which kind of motivation.

  • 1
    No, it's not a purpose adjunct, but a complement of the noun "motivation". We know it's a complement, not a modifier, because it is licensed (specifically permitted/required) by the noun. – BillJ Mar 10 '19 at 13:15
3

These factors can be something about the person or something about the situation, which can combine [to determine the consumer's motivation [to process product-related information at a given point in time]].

You are right that the determine infinitival clause is a purpose adjunct -- note that "in order" can be inserted: ... which can combine in order to determine ...

But the process infinitival is not an adjunct. It's complement of the noun "motivation". We know it's a complement, not a modifier, because it is licensed (specifically permitted/required) by the noun.

Note that modifier infinitivals are a special kind of relative clause, e.g. We found [a big box to keep the CDs in].

  • Thank you so much . If it's a special kind of relative clause, is your example sentence the equivalent of "We found a box in which we can keep CDs"? – Kathy Mar 10 '19 at 14:09
  • @Kathy Yes: in many instances, infinitival relatives have a modal meaning. – BillJ Mar 10 '19 at 14:13
  • Thank you so much for the answer again :) – Kathy Mar 10 '19 at 14:17

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