if – roo-gore
Written as rúguŏ or ruguo
To remember that if is pronounced roo-gore (ruguo) in Mandarin Chinese, use the following mnemonic:
If you can keep your head when all about you are losing theirs, you can keep your baby roo looking gorgeous (roo-gore).

Note: To clearly distinguish that we are dealing with the word "if" we have enhanced the picture by connecting the word "if" to the most famous poem ever written starting with "if".