For I am not come to make use of GSM-Mar at all because it is not in discussions with my sister, but I care helped sister. Share activities with, for example, to play games, teach dance.
I did not take advantage because the grammar is not a leader, in a conversation with her. But I can help the younger to do activities such as playing games with me, teaching me to dance.
For I brought the grammar uses, because does not lead to chat with you, but I can help take care of sister doing activities together with you like Playing games to teach dance.