文法是否有錯

1. My favorite food is fries.
這句要用is，因為food是第三身單數。只有以there或here開啟的句子，或以倒裝寫法的句子才會由句後的名詞（因為其實那才是主語）去影響動詞。Here is a pen/ Here are some pens; There is a tree/ There are some trees; In the car are three people.

2. They are yellow in color.
雖然說They are yellow文法沒錯，但意思上很怪。薯條當然是黃色的，所以若你只說They are yellow，別人可能以為你有其他意思。

3. I like those from McDonald's.
"I eat"是中式英文，除非你要特別指出是「吃」，寫英文時多數會用to have。在餐廳的「在」是at，而非in。由於麥當勞是人名，所以在說餐廳名字的時候要轉成possessive型('s 或 s')。

第一句 My favorite food is fresh fries.
(Fresh fries is one kind of food,if you love fresh fries and ice cream,you may use "are")

第二句 It is yellow.
(fresh fries aren't living things,it is non-living things,you may use "it" but sometime,you can also use they)

第三句 I usually eat fresh fries in McDonald.
(You may not use "it/them",sometime if you didn't tell what do you eat in McDonald cleaner before.People don't know what do you eat in McDonlald.Also,you can eat fresh fries at any restaurants.So you may use "usually" to tell people that you eat fresh fries at McDonal most the time)

2008-03-21 08:43:20 補充：
no.4 I like to share it with my friends.

1. French fries are my favorite food. (you may also use fries or chips)
2. They are yellow in color.
3. Your sentence should be correct. but the whole thing seems so weird
you may say I usually eat them in McDonalds
since there is not only McDonalds which serves French fries
4. I would like to... ...

My favorite is fries.

They are yellow color.

I eat them in McDonald.

I like to share them with my friends.