What on earth does this mean? I asked, surprised. 
I wondered what it meant.
I knew exactly what it meant.
A man is hanging his laundry on a line.
A man is taking a lunch break.
The woman said that the cook was very upset.
SCR systems were retrofitted in Germany in the late 1980s.
The oxen are crossing a busy highway.
William Smellie worked on wikipedia for most of his career.