奶奶一边洗菜,一边自言自语。Nǎinai yìbiān xǐ cài, yìbiān zìyánzìyǔ.Grandma washes the vegetables and mutters to herself.
他走在路上自言自语,把旁边的人吓了一跳。Tā zǒu zài lùshang zìyánzìyǔ, bǎ pángbiān de rén xià le yí tiào.He walked down the road talking to himself, which gave the people beside him a start.
考试前,她小声自言自语,告诉自己不要紧张。Kǎoshì qián, tā xiǎoshēng zìyánzìyǔ, gàosu zìjǐ bú yào jǐnzhāng.Before the exam she quietly talked to herself, telling herself not to be nervous.