In order to understand the English grammar, I have to read the Grammar Section in OALD. I don't understand the grammar constituents of to-infinitives in these sentences. How can I understand them?
OALD said
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Eat and to eat are both the infinitive form of the verb. Eat is called a BARE INFINITIVE and to eat is called a TO-INFINITIVE. Most verbs that take an infinitive are used with the to-infinitive.
- the goldfish need to be fed.
- she never learned to read.
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Some verbs can be used with both a noun phrase and a to-infinitive. The noun can be the object of the main verb.
- Can you persuade Sheila to chair the meeting?
or the noun phrase and infinitive phrase together can be the object.
- *I expected **her to pass** the driving test first time.*
- *We'd love **you to come** and visit us.*
My question is that in 1, can I think of the to-infinitive (to be fed and to read) is the object of need and learn, respectively？ And in 2, why can her to pass or you to come be bound together to be the object of expect or love? At the same time, why I can't think of Sheila to chair in this way?
I love our language, but can't understand its grammar :-(
Edit: What role is the to-infinitive playing in these sentences?