Hello! I've got stuck on the expressions:
It's difficult to do. / It's difficult to be done.
I mean, when I use "it" do we always use "to do"? (I think yes, when "it" is undefined: it's difficult for somebody to do)
And what happens when we have a specific subject.
For example,
The tiger in the jungle is difficult to be seen. (The tiger cannot be seen by us because it's hidden)
Whereas,
The tiger in the jungle is difficult to see. (I understand that the tiger cannot see)
I have searched in the forum that this is correct:
The book is difficult to read.
But I don't understand why? I mean the book cannot be read. (We don't say the book cannot read)
In general, I would like to learn when we use active/passive voice after such expressions (sub verb adj to + ? ) Do the linking verbs play a role?
Thank you very much in advance.
It's difficult to do. / It's difficult to be done.
I mean, when I use "it" do we always use "to do"? (I think yes, when "it" is undefined: it's difficult for somebody to do)
And what happens when we have a specific subject.
For example,
The tiger in the jungle is difficult to be seen. (The tiger cannot be seen by us because it's hidden)
Whereas,
The tiger in the jungle is difficult to see. (I understand that the tiger cannot see)
I have searched in the forum that this is correct:
The book is difficult to read.
But I don't understand why? I mean the book cannot be read. (We don't say the book cannot read)
In general, I would like to learn when we use active/passive voice after such expressions (sub verb adj to + ? ) Do the linking verbs play a role?
Thank you very much in advance.