感谢信是得到某人或某单位的帮助、支持或关心后答谢别人的书信。感谢信对于弘扬正气、树立良好的社会风尚，促进社会主义精神文明建设有着重要意义。你知道英语四级的感谢信怎么写吗？
DearMary,
IwouldliketotakethisopportunitytoexpressmyheartfeltgratitudetoyouforyourhelpwhenIwasindifficulty.Youhavebeenverykindandhelpfulsincewekneweachother.
Lastweek,Icaughtabadcoldandhadtostayathomeforaweek.WhenIwasworryingaboutthelessons,youcametomyhomeafterschoolandhelpedmewitheverysubject.Withyourhelp,Ididn’tfallbehindothers.
Again,thankssomuchforyourenthusiastichelp.EventhoughyouaretoabouttogoabroadforfurthereducationIknowthatIwillalwaysstayintouchwithyou.IwishyoueverysuccessinthefutureandIhopewecanexchangemoreviewpointsonstudy.
Pleasekeepintouch,anddropinandvisituswheneveryouareinthispartoftheworld.
Verysincerely,
LiMing