def build_ing_dict(tag_sent_list):
	ing_dict = {}
	key = 0
	pattern = r'^.*(?:ing)$'
	for word in range(len(tag_sent_list)):
			if re.match(pattern,tag_sent_list[word]):
				ing_dict[key] = tag_sent_list[word]
				key+=1
	print ing_dict