Qué es la diferencia entre hace y desde hace Trabaja en un instituto de lenguas desde hace ocho años. Trabaja en un instituto de lenguas hace ocho años. What's the problem with the second sentence and why? I've got quite confused about these two.

Please help me analyze the sentence. The saying “stupid is as stupid does ", what are these two stupids, are they adjectives or nouns?

How to improve my English skills? speaking , listening , reading and writing

Rest is also important I'm a student that is in Grade Nine .As we all known ,we will face a big text and the grades meanwhich school we will go. Parents and teachers always ask us to study harder and harder. And that influence us to study all the time. Many classmates that around me don't have a rest after class and they think it is a waste of time . Zhu is my good friend as well as an excellent grade nine student . She study very hard and never plays with other classmates. But nowdays she has many problems. Her eyes become wrose and wrose and she doesn't see clearly without glasses. And Zhu also feels unhappy and always has a bad temper. As a result ,her marks are falling down. In my opinion , all work and no play makes Jack a doll boy. Having a rest during two classes is important. Although having a good rest is important ,you should be careful of the ways to rest . I always wash my hands after class and have a look at the green trees because it's good for our health.Then I often talk with my deskmates .And it always make me laugh. In a word. Study hard makes us tired .But if we have a good rest . It not only good for our health but also the study.

First notebook entry: Introducing myself I am a girl at senior high school . I am shy and I;m not good at English .