(1)There were many German(s) at the stadium.
"There were many Germans at the stadium."
(2)The new government will cone[=come] into [the删] power next month.
"The new government will come into power next month.
(3)If the weather is fine, we’ll eat [at删] outdoors.
"If the weather is fine, we’ll eat outdoors. "
German:Germans (many后接复数名词。)
cone:come 还有去掉the。(come into power 执政,当权)
at 去掉 outdoors是副词,前面不要加介词。)