1 Train regularly or else you won't be ready in May.
If you don't train regularly, you won't be ready
in May./Unless you train regularly, you won't
be ready in May.
2 Listen to the coach or you won't know what
to do.
3 We'd better hurry or we'll miss the start of
the match.
There are two main political parties in the USA: the Democratic (symbolized by a “donkey”) and the Republican (its symbol is an “elephant”) (Present Simple)
The flag of the USA is called “Stars and Stripes” (Present Simple)
Such industries as machine-building, ship-building are highly developed in the country (Present Simple)
Везде Present Simple, т.к. ведётся повествование.