1) I will do some clearing this afternoon if I don't feel very tired after work.
2) I usually do some cleaning in the afternoon unless I am tired after a harday's work.
3)Darren always complains if anything goes wrong.
4) We should have everything ready for the conference . Mr Smith will be mad with us if anything goes wrong.
5) the weather is quite bad. If it rains tonight , I won't go out.