appreciate it

Hi,
my dictionaries say you can use "I appreciate how/what/why..." and "I appreciate that...", but give "I'd appreciate it if..." as a fixed structure to remember (written in bold, like all the other collocations).
So I guess it's just that way, it's idiomatic.

Yoong LiatI would appreciate it if you could teach me how to do this problem sum.

Why is it necessary to use 'it'?

Many thanks.

Because in its "to value" sense, "appreciate" is a transitive verb and needs an object. Transitive verbs cannot be used on their own.

I'm quite sure that without it the sentence is incorrect. As for the reason, I was thinking: maybe we need it because "appreciate" is transitive ... What if we compared:

I wonder if you could lend me some money.
I'd appreciate it, if you could lend me some money.

Is it only on

Hi guys,

I would appreciate it if you could teach me how to do this problem sum.

Why is it necessary to use 'it'?

You might like to consider the fact that we can and quite often do rearrange the wording of this into a more standard conditional sentence, ie

If you could teach me how to do this prob

Thanks, guys, for your replies.

I'd [appreciate / like / love / prefer / enjoy / hate / ...] it if ...
I'd find it [enjoyable / disgusting / interesting / shocking / ...] if ...

I [appreciate / like / love / prefer / enjoy / hate / ...] it when ...
I find it [enjoyable / disgusting / interesting / shocking / ...] when ...

Combinations like I would appreciat

Thanks, CJ.