Shorter regional rail services will still usually be operated exclusively by multiple units where they exist , which have a shorter range and operate at lower average speeds than services on Inter-city rail networks .
ADJ ADJ NOUN NOUN AUX ADV ADV AUX VERB ADV ADP ADJ NOUN ADV PRON VERB , DET VERB DET ADJ NOUN CCONJ VERB ADP ADJ ADJ NOUN SCONJ NOUN ADP PROPN NOUN NOUN .