Can the Sharingan Copy Hidden Jutsu? The Sharingan copies techniques, but i want to understand can the sharingan copy hidden technique like the shadow style jutsu?

Because according to "narutowikia website" the sharingan copies hand seals, and since the nara clan, ino clan e.t.c that uses hand seals in performing their secret jutsu, why have I never seen a sharingan user copy secret jutsu when its not a "kekkai genkai"?

Thanks, I hope my question is simple.
Sharingan users need the prerequisite abilities before they can mimic a jutsu they have...
  Wiki  


and


  Many hiden techniques are rooted in Yin–Yang Release, for example is Yin Release used in the Nara clan's Shadow Imitation Technique and Yang Release in the Akimichi clan's Multi-Size Technique. Wiki


So the answer would be yes if the sharingan user has the necessary abilities to perform the technique.
It is similar to the reason why the rasengan cannot be copied. The user can see the chakra and how it moves but unless he can control his own like that he won't be able perform it.
The jutsus of the Nara and Yamanaka have hand seals but it is only one and the majority of the technique is rather manipulation of the chakra.