I completely forgot about it, but you can actually mark multiple fields as correct answers by adding a hidden div somewhere in the layout like this:
<div id='combinedans'>{{pinyin1}},{{pinyin2}}</div>
where the style is something like:
#combinedans{
display: none;
}
Anything that is inside the combinedans div will count as a correct answer, so you could even add other fields or static text in there (make sure to separate it with a ; or , according to how your data is structured). The syntax that creates the input (e.g. {{spellcheck:fieldname}} ) will only be used for creating the input and determining the type of input, the field used with it will not matter.

to move to the next, right? Technically, something like that is possible to do. You could put the example sentences on the back of the card still but under a new tab within the card or something? 
I have siblings separated and also a lot of the sentences are too hard for me right now, so it would be nice to divide those two