Foundation Work:Single Syllable Tones in Isolation 5
Sample pinyin with tone marks:mā，má，mǎ，mà
Please repeat the pinyin pronunciation with the tone，sound the four tones of the syllable ordinally to yourself to decide which tone matches the tone that you have heard and then put the tone mark on top of the pinyin accordingly:
Pa pao piao pan
Ma men mi meng
Fei fan fang feng
Ti ting tie tian
Kan kai kong ku
Sa sang song suan
Shan shang shu shuo
Hei hu hua huang
Yao you yang ying
Wa wu wang wo
