sentence correctness

[hela]

Dear teachers,
Would you please tell me if the English is correct here?

a) Both books/Both the books (?) /Both of the books you lent me are interesting.

b) Both books you lent me I found interesting? (correct or clumsy?)
“the object has been topicalized” what’s the meaning of “topicalized”?

c) I found both books you lent me to be interesting.
(do we normally insert the "to be" if the descriptive word does not immediately follow the noun it describes)

d) I found both books you lent me interesting.

e) Neither you nor your boyfriend wantsto see the relationship evolve.(is the word "evolve" appropriate here?)

Many thanks,
Hela

[Rusty]

Dear teachers,
Would you please tell me if the English is correct here?

a) Both books/Both the books (?) /Both of the books you lent me are interesting.

b) Both books you lent me I found interesting? (correct or clumsy?)
“the object has been topicalized” what’s the meaning of “topicalized”?

c) I found both books you lent me to be interesting.
(do we normally insert the "to be" if the descriptive word does not immediately follow the noun it describes)

d) I found both books you lent me interesting.

e) Neither you nor your boyfriend wantsto see the relationship evolve.(is the word "evolve" appropriate here?)

Many thanks,
Hela

a) Both books/Both the books /Both of the books you lent me are interesting.
(All OK).
b) Both books you lent me I found interesting? (correct or clumsy?)(OK).
“the object has been topicalized” what’s the meaning of “topicalized”?
(Topicalize means to put emphasis on something, in this case, the object, by moving it to the beginning of the sentence).

c) I found both books you lent me to be interesting.
(do we normally insert the "to be" if the descriptive word does not immediately follow the noun it describes)
(Inserting "to be" sounds natural. Omitting "to be" is common too).

d) I found both books you lent me interesting. (OK. Without "to be" there is usually a slight pause in speech between me and interesting).

e) Neither you nor your boyfriend wants to see the relationship evolve.(is the word "evolve" appropriate here?) (Yes).