Words similar to if

Example sentences for: if

How can you use “if” in a sentence? Here are some example sentences to help you improve your vocabulary:

My sister, when small, asked our parents if we lived in America.
Some of this would be quite funny if it weren't so serious.
If all organisms work in the same way, understanding individual biology offers an obvious route to explaining nature's patterns—ecological processes become a kind of meta-metabolism.
Patients were excluded if they had active Centers for Disease Control (CDC) Class C status; could not comply with the study schedule; were in another investigational drug study; were undergoing opiate detoxification; had a malabsorption syndrome or pre-existing condition that interfered with normal gastrointestinal transit; had clinically significant laboratory abnormalities, required radiation therapy or cytotoxic chemotherapy, or had received immunomodulating agents, within 4 weeks pre-study; or had received an HIV-1 immunotherapeutic vaccine within 3 months pre-study.
Hypersaline brine and artificial seawater can be used with Champia parvula only if they are accompanied by at least 50% natural seawater.