Hello, can you be the proposer to my that what way that you suggest to me to improve my English skills ?

I Just saw this phrase while I was watching TWD: "If you choose me as leader ne would be better off" why the native speaker adds ''off' ? Is it really necessary?.

English students, try this! Topic: Subject Verb Agreement

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1. ‎‎‎Looking through the window I saw him traverse the garden. （Change the sentence above↑ to below↓） When I was looking through the window I saw him traverse the garden. 2. Arriving at the airport she found a lot of people waiting for the security check. （Change the sentence above↑ to below↓） When she arrived at the airport,she found a lot of people were waiting for the security check. ↑The beginning of the two sentences is present participle, but after changing participles to verbs, the tense forms of the two verbs（was looking through、arrived at） are different. why？

1. ‎‎‎Looking through the window I saw him traverse the garden. （Change the sentence above↑ to below↓） When I was looking through the window I saw him traverse the garden. 2. Arriving at the airport she found a lot of people waiting for the security check. （Change the sentence above↑ to below↓） When she arrived the airport,she found a lot of people were waiting for the security check. ↑The beginning of the two sentences is present participle, but after changing participles to verbs, the tense forms of the two verbs are different. why？

‎If it should rain tomorrow,I would saty at home. If it should rain tomorrow,I will saty at home. If it should rain tomorrow,saty at home. ↑What is the difference between three sentences

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