Communication: using Infinitive

Physicians examine patients ____________ illnesses.

• to diagnose

• diagnosing

Biologists compare different species ____________ evolutionary relationships.

• to understand

• understanding

Archaeologists explore ancient ruins____________ artifacts.

• to uncover

• uncovering

Physicists conclude their experiments ____________ meaningful results.

• to find

• finding

Psychologists conduct experiments ____________ human behavior.

• to study

• studying

Chemists characterize compounds ____________ their properties. 

• to determine

• determining

Scientists analyze data ____________ patterns.

• to identify

• identifying

Climatologists model climate patterns ____________ future changes.

• to predict

• predicting

Historians review primary sources ____________ historical events.

• to analyze

• analyzing

Astronomers observe celestial objects____________their behavior.

• to study

• studying