seem (appear) to V 似乎....
It seems(appears) +that +S +V
My dog seems to understand what I said.
==It seems that my dog understands what I said.
The children appeared (to be) pleased(形容词) with their presents(礼物)
==It appeared that the children were pleased with their preents.
人+happen(chance) to V 碰巧
事 +happen to+人(发生)
I happened to meet one of my friends at the station
a friend of mine=one of my friends
prove(turn out) to V 结果是..证明是
The rumor(谣言) proved(turned out) to be true.
==It turned out that the rumor was true.
come(get) to V 变得
come/get +to +地点
You will come(get) to like this town.
be + to 不定词 表预定 打算要做
The meeting is to be held on Wednesday.
表义务 必须;不得不
Rules are to be observed(遵守)
You are to start as(一样) early as(像) pssible.