stand - stood - (a)  

(a)   - understood - understood

understand - (a)   - understood

understand - understood - (a)  

(a)   - burnt - burnt

burn - (a)   - burnt

burn - burnt - (a)  

(a)   - dreamt - dreamt

dream - (a)   - dreamt

dream - dreamt - (a)  

learn - (a)   - learnt

learn - learnt - (a)  

(a)   - learnt - learnt

(a)   - left - left

leave - (a)   - left

leave - left - (a)  

(a)   - lit -lit

light - (a)   -lit

light - lit - (a)  

(a)   - lost - lost

lose - (a)   - lost

lose - lost - (a)  

(a)   - meant - meant

mean - (a)   - meant

mean - meant - (a)  

(a)   - shot - shot

shoot - (a)   - shot

shoot - shot - (a)  

(a)   - sat - sat

sit - (a)   - sat

sit - sat - (a)  

(a)   - spelt - spelt

spell - (a)   - spelt

spell - spelt - (a)  

stand - (a)   - stood