the peoples tools from long ago
The right present participle of the phrase "building of steel ships" is "building", this is correct. A better sentence is "Building of steel ships that are light and strong is important".
"Building of steel ships are light and strong" isn't a grammatically correct sentence. A better sentence is "The building of steel ships that are light and strong is crucial".
The ships are built in drydocks which can be flooded to float the ships out.
it floats
The builders judge the names of the ships before building them and after they drew up the blueprints
igloo
yes
No
yes, they are making ship
building ships
building ships
For building ships and houses.