Pre-heat a large skillet or wok over medium-high heat for 2 minutes.
In a small bowl, add the oil, soy sauce, and sugar. Stir to combine.
Add the green beans to the skillet. Then, carefully add the soy sauce mixture to the hot skillet (liquid may spatter a bit). Stir to coat the beans in sauce. Cook for about 6 minutes, stirring occasionally.
Stir the garlic into the green beans. Cook for 1 minute, stirring often. Then, remove the skillet from the heat.
