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

Why is it necessary to use 'it'?

Many thanks.
Comments  
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. Emotion: smile
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.
Students: We have free audio pronunciation exercises.
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 one of those weird hypotheses of mine? Emotion: smile
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 problem, I would appreciate it.

Best wishes, Clive
Thanks, guys, for your replies.
Students: Are you brave enough to let our tutors analyse your pronunciation?
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 appreciate it if you could teach me ... are often work-arounds for the more problematic and sometimes too formal sounding I would appreciate you/your teaching me ...

CJ
Thanks, CJ.