... population of the world is rising very fast. (not 'rises') * Is your English getting better? (not 'does your English get better') @p3 EXERCISES 1.1 Complete the sentences with ... continuous is more usual with how long, since and for (see also Unit 10B): * I've been learning English for a long time. (not usually 'I've learnt') You can normally use either ... etc.) or present perfect continuous (I have been ~ingetc.). 1. Maria has been learning (learn) English for two years. 2. Hello, Tom. I (look) for you all morning. Where have you been? 3. Why...