reduction of that clause

Question

"we know that they don't take excellent decisions that causes that the covid-19 ends"

"we know that they don't take excellent decisions causing the covid-19 ends"

in firs sentence, I want to reduce last "that clause" but I'm not sure whether it's correct

Answer 1

To begin with the initial sentence is not correct. You might write it that way instead.

• we know that they don't take the decisions that would cause the pandemia of covid-19 to end.

You can't use a that-clause with the verb "cause" (ref.).

.