they were shaking, they used to shake
Sus piernas temblaban del miedo.
Her legs trembled with fear.
Mis manos temblaban demasiado para enhebrar la aguja.
My hands were shaking too much to thread the needle.
Sus manos temblaban ligeramente cuando se puso a hablar.
His hands trembled slightly when he began to speak.
Tom se dio cuenta de que a Mary le temblaban las manos.
Tom realized that Mary’s hands were trembling.