在线改英语作文,帮忙看看语法啦,什么时态有没用错误

e going to 是将来时态,后面不能加last week,可以加tommorrow,next week,另外,一句话不能出现两个动词,比如第二句,was和visit不能同时出现,第二句应该为I went to the local zoo last week,这是一般过去时.there 前不用任何介词,把in去掉.最后一句应改为There I looked manatee they are very strong and intelligent and they have ten feet long and 1000 pounds.主语是they的时候,主语是他们（她们,它们）,谓语动词用复数