floss your teeth
brush your teeth
a millipede
uncharted = unmapped
a heavy pack of ice

Ehtolauseet:
1.Jos Donald Trump valloittaa Grönlannin, olen shokissa.
If Dnald Trump occupies Greenland, I will be shocked.
2. Jos D. T.  valloittaisi Grönlannin, olisin shokissa.
If D. T. occupied Greenland, I would be shocked.
3. Jos D. T. olisi valloittanut Grönlannin, olisin ollu shokissa.
If D. T. had occupied Greenland,  I would have been shocked.

If a serious crisis were to arise, the government should act swiftly.
= Were a serious crisis to arise, the government should act swiftly.

They will have been married for sixty years by the first of June. = II futuuri, jota suomessa ei ole; käännetään perfektillä