A method for recognizing the presence of liquid in a gas flow flowing in a pipeline using an ultrasound flowmeter, wherein the ultrasound flowmeter has a horizontal pipeline section through which gas can flow in a flow direction and which has a center axis and which comprises at least one pair of measurement paths (30, 36; 32, 34) of equal lengths which are spaced apart from one another, which extend in parallel with one another in separate horizontal planes (Eu1 and Eo1; Eu2 and Eo2) and which are inclined with respect to the flow direction; wherein each horizontal plane (Eu1, Eo1; Eu2; Eo2) of a pair of measurement paths (30, 36; 32, 34) is displaced vertically by an equal predefined distance (d1; d2) with respect to the center axis such that one of the planes (Eo1; Eo2) lies in an upper region above the center axis and the other plane (Eu1; Eu2) lies in a lower region beneath the center axis; wherein an ultrasonic transducer (24, 26; 20, 22) is arranged at each end of a measurement path (30; 32); and wherein each ultrasonic transducer (24, 26; 20, 22) is configured to act selectively as an ultrasound transmitter and as an ultrasound receiver such that ultrasonic signals can be transmitted and received in both directions on a measurement path and the flow speed of the gas in the plane of the measurement path and the speed of sound in the gas (SoS) can be determined from the time of flight of the ultrasonic signals, wherein the method is configured in three stages, and - in a first stage, a check is made whether the bottommost measurement path delivers a valid measurement value for the flow speed of the gas; - in a second stage, a turbulence value for each measurement path (30, 36; 32, 24) of a pair is determined from a multiple measurement of the flow speed of the gas in the plane of a measurement path (30, 36; 32, 34) and the ratio of the two turbulence values is formed; - in a third stage, the respective speed of sound (SoS) is determined on both measurement paths (30, 36; 32, 34) of a pair and the ratio of the two speeds of sound (SoS) is formed; and a liquid warning signal is output - when an invalid measurement value is delivered in the first stage; or - when the ratio of the turbulence values differs from 1 by more than a predefined tolerance value in the second stage; or - when the ratio of the speeds of sound differs from one 1 by more than a predefined tolerance value in the third stage. - in a first stage, a check is made whether the bottommost measurement path delivers a valid measurement value for the flow speed of the gas; - in a second stage, a turbulence value for each measurement path (30, 36; 32, 24) of a pair is determined from a multiple measurement of the flow speed of the gas in the plane of a measurement path (30, 36; 32, 34) and the ratio of the two turbulence values is formed; - in a third stage, the respective speed of sound (SoS) is determined on both measurement paths (30, 36; 32, 34) of a pair and the ratio of the two speeds of sound (SoS) is formed; - when an invalid measurement value is delivered in the first stage; or - when the ratio of the turbulence values differs from 1 by more than a predefined tolerance value in the second stage; or - when the ratio of the speeds of sound differs from one 1 by more than a predefined tolerance value in the third stage.