Grammar Tense Structure:
- Present Tense: call / calls in
- Past Tense: called in
- Past Participle: called in
- Present Participle: calling in
1: When you call your boss or place of employment to say you cannot work that day because you are sick, you call in or call in sick.
non-separable phrasal verb
- My boss was so angry when I called in three days in a row.
- He stated that I was calling in sick too often and it was my final warning.
2: When you request the help of people or of an organization with more experience, power, or knowledge to help with a problem or difficult project, you call them in.
separable & non-separable phrasal verb
- When the local police couldn’t handle the protestors, the riot squad was called in.
- The local police chief considered calling reinforcements in to help with the disturbance.