1
We are going to build a house.
Sign 'we', then use the alternating upward stacking motion for 'build', and finish with the sign for 'house' by tracing a roof and walls in the air.
2
She wants to build a snowman.
Point to indicate 'she', sign 'want', use the flat hands stacking upward for 'build', and then sign 'snowman' by showing the shape of the snowballs.
3
They built a strong team.
Point to indicate 'they', sign 'build' using the alternating flat hands, then sign 'strong' and 'team'. Remember that ASL relies on context or time signs for past tense, so the base sign for 'build' remains the same.