Complex sentence: For example, if PRO is ungoverned, then it must not be case-marked; however, it has been observed that in Icelandic, PRO appears to be case-marked, and is thus governed.
Split into simpler sentences: For example, if PRO is ungoverned, then it must not be case-marked. However, it has been observed that in Icelandic, PRO appears to be case-marked, and is thus governed.