前面和後面接什麼，is

1、The first stage in research is data collection.研究工作的第一步是收集資料。

2、The fact is， they're there to make money.真實的情況是，他們去那兒是為了賺錢。

3、Things ain't what they used to be.現在情況不比從前了。

4、Now is a good time to invest in the property market.現在是對房地產市場投資的好時機。

is，前面和後面接什麼

is 前面可以加非常多的單數名詞

It is book.

he is a boy.

she is a girl.

dog is baking

cat is sleeping.

還可以加上萬個單數名詞