The phrase "appears in two forms" is correct and usable in written English.
You can use it when describing something that has two different manifestations or variations.
Example: "The concept of energy appears in two forms: kinetic and potential."
Alternatives: "exists in two variations" or "manifests in two types".
Click here to buy a copy for £20 The mustard appears in two forms.
Each of the seventy-one pieces in this volume appears in two forms: the original tablature notation and a transcription into modern notation.
It appears in two forms in the New Testament: the shorter version in the Gospel According to Luke 11 2 4 and the longer version, part of the Sermon on the Mount, in the Gospel According to Matthew 6 9 13.
At this point, nonlinearity of polymeric materials appears in two forms.
Sullivan appears in two forms: an undead adult enemy and a neutral child supporting character.
Vitamin D appears in two forms: the naturally occurring vitamin D3 in mammals and vitamin D2 derived from plant sources and chemical synthesis.
Every week, Patrick conducts an athlete interview that appears in three forms: in print in the pages of S.I.; as an audio segment on "The Dan Patrick Show"; and, finally, as an archived sound file on the FanNation site, where it is entombed for those industrious types who can't listen live.
Wherefore her power appears in three forms, having as symbol of the new moon the figure in the white robe and golden sandals, and torches lighted: the basket, which she bears when she has mounted high, is the symbol of the cultivation of the crops, which she makes to grow up according to the increase of her light: and again the symbol of the full moon is the goddess of the brazen sandals.
Quetzalcoatl, mythical creator of the world, appears in three forms: star, god, and human.
Results appear in two forms: in the target language and translated back into the original language.
