Conjunctions: dass or ob
In these exercises, you must use either dass or ob to fill in the blank. Dass roughly translates as the English conjunction "that," as in "Did you know that it would rain today?" Ob is used to mean "whether."
Note that in English, we can use ‘whether’ and ‘if’ interchangeably. Because of this, some German learners get confused and think that ob means "if". "If" is a complex English word with many meanings. It is better to think of ob as meaning "whether." The phrase als ob should be considered separately from ob. It means "as if".