以代词“其”开头的句子可以写作：“其……者……”的形式。例如：
1. 其有善者，则学之。
2. 其有不好学如吾之所谓，则改之。
请注意，使用代词“其”并不意味着这个代词后面一定会跟着一个完整的句子。这个代词通常会跟在动词或者形容词后面，引导一个名词性短语，起到一个定语的作用。在句子开头使用代词“其”的情形相对较少。以上仅是提供一种常见的使用模式，具体情况可能因上下文而异。
1、Thecatissleepingonthecouch.Itlookspeaceful.
2、Susanisgoingtomeetherfriendsatthemall.Sheisreallyexcited.
3、Johnisstudyingforhisexams.Hewantstogetgoodgrades.
4、Theflowersinthegardenareblooming.Theylookbeautiful.
5、Mysisteriscomingoverfordinner.Sheisbringingherkids.
6、Thesunisshiningbrightlytoday.It"saperfectdayforapicnic.
7、Thelaptopisnotworkingproperly.Itneedstobefixed.
8、Wehavetocleanthehousebeforeourguestsarrive.Theyarecomingtomorrow.
9、Thebookonthetableismine.Ileftitthereyesterday.
10、Thecarinthegarageneedstobewashed.It"sreallydirty.
11、MikeandJanearegettingmarriednextmonth.Theyareveryhappy.
12、Thecakeintheovensmellsreallygood.It"salmostready.
13、Thestudentsintheclassroomarelisteningtotheteacher.Sheisexplainingthelesson.
14、Thewaterintheglassiscold.Iwantsomeiceinit.
15、Mymomiscookingdinner.Sheismakingspaghetti.
16、Theclothesintheclosetneedtobesorted.Theyareallmixedup.
17、Thedogintheyardisbarking.Hewantstogoforawalk.
18、Themoviewewatchedlastnightwasreallyscary.Itgavemenightmares.
19、Thephoneinmypocketisringing.It"sprobablymyfriend.
20、Thetreesintheparkaretall.Theyprovideshadeonahotday.
21、Thecoffeeinthecupishot.Ineedtowaitforittocooldown.
22、Thehouseacrossthestreetisforsale.Ithasabigbackyard.
23、Themusicintheclubisloud.Wehavetoshouttotalktoeachother.
24、Thecomputerintheofficeisslow.Itneedstobeupgraded.
25、Thefoodattherestaurantisdelicious.Iwanttotryeverything.
26、Thebabyinthecribissleeping.Helookssopeaceful.
27、Thepencilonthedeskissharp.Icanuseittowrite.
28、Theclothesonthelinearedry.Icanbringtheminnow.
29、Thebeachisbeautiful.Ithaswhitesandandclearwater.
30、Thefishintheaquariumarecolorful.Theyswimaroundallday.
31、Thebikeinthegarageneedstoberepaired.Ithasaflattire.
32、Theskyiscleartoday.It"saperfectdayforstargazing.
33、Thebookontheshelfisinteresting.Iwanttoreadit.
34、Thesnowonthegroundisdeep.Wecanmakeasnowman.
35、Theplantonthewindowsillneedstobewatered.It"slookingdry.
36、Thecarintheparkinglotismine.IhavetorememberwhereIparkedit.
37、Themusicontheradioiscatchy.Ican"tstophummingthetune.
38、Thevaseonthetableisfragile.Ihavetohandleitwithcare.
39、Theshoesonthematarewet.Ihavetodrythembeforewearingthem.
40、Thepersoninthemirrorisme.Ineedtocombmyhair.
41、Thebasketballonthecourtisbouncing.Thekidsareplayingagame.
42、Thepizzaintheovensmellsdelicious.Ican"twaittoeatit.
43、Theclockonthewallisticking.It"scountingdowntheseconds.
44、Thesuitcaseonthebedneedstobepacked.I"mgoingonatrip.
45、Theeggsinthecartonarefresh.Icanmakeanomelet.
46、Theshoesintheclosetareold.Ineedtobuyanewpair.
47、Thesocksinthedrawerareallmixedup.Ineedtosortthem.
48、Thechairintheroomiscomfortable.Icansithereforhours.
49、Thepicturesonthewallarebeautiful.Theyaddcolortotheroom.
50、Thehomeworkonthedeskisdifficult.Ineedhelpwithit.
51、Thehotelwestayedinwasluxurious.Ithadaswimmingpoolandaspa.
52、Theyoghurtinthefridgeisexpired.Ihavetothrowitaway.
53、Thecatintheboxiscute.Shelovestohideinthere.
54、Thecarintheshowroomisexpensive.Ican"taffordit.
55、Thekeysonthetablearemine.Ihavetoremembertotakethemwithme.
56、Theleavesonthetreesarechangingcolor.It"sautumn.
57、Theicecreaminthefreezerismyfavoriteflavor.Ican"tresistit.
58、Thephotosinthealbumarememories.Theyremindmeofgoodtimes.
59、Thegameonthecomputerisaddictive.Icanplayitforhours.
60、Thepizzaontheplateishot.Ihavetobecarefulnottoburnmymouth.
