“自言自语”常见的英文表达是 “talk to oneself” 或 “say to oneself”，也可用 “mutter to oneself”（侧重小声嘟囔着自言自语） 。例如：
He often talks to himself when he is thinking deeply.（他深入思考时常常自言自语。）
She said to herself, "I must do better next time."（她自言自语道：“我下次一定要做得更好。” ）
The old man muttered to himself in the corner.（老人在角落里小声嘟囔着自言自语 。）