The most important part of a sentence is at the end.
To give ideas emphasis we put them at the end e.g. The computer can solve most of our problems > Most of our problems can be solved by the computer.
In the same way English has special constructions to make this happen e.g. 'It's a pity you didn't tell be before'. 'It doesn't matter what you say'.
Practice Exercises: Put these words in order and add words to construct useful sentences.
1.known not whether lives lost any.
2. shocking no-one noticed what happened
3. compulsory seat belt wear.
4. matter you say what.
5. would a disaster be if married didn't we.
6. people you want what always do do?
Answers:1. it is not known whether any lives were lost. 2.it was shocking that no-one had noticed what had happened. Or: it was shocking that no-one noticed what happened. 3.it is compulsory to wear a seat belt. 4.it doesn't matter what you say. 5.it would be a disaster if we didn't get married. 6. do people always do what you want?
See The A - Z of English Grammar & Usage for the rules.