to do someone’s job temporarily
hacer el trabajo de alguien temporalmente (hacer el trabajo de alguien temporalmente)
"I had to fill in for my colleague while he was on leave."
"Tuve que rellenar por mi colega mientras él estaba de permiso." (Tuve que **fill in for** mi colega mientras él estaba de permiso.)
to use your past achievements as a base for further progress
to suddenly begin to express a strong emotion such as laught...
to unite countries for a common purpose or goal
to make yourself very tired, often due to stress or overwork
to include someone in information or discussions
to prepare the basic foundation for something important in t...